You claim the 144,000 appear on Mount Zion in Heaven. You support your claim with these two passages of the Scriptures: Rev.14:1-7 and Rev.15:1-6. First, it is the redeemed saints that appear on Mount Zion in Heaven.
“But ye are come unto mount Sion, and unto the city of the living God, the heavenly Jerusalem, and to an innumerable company of angels, To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect, And to Jesus the mediator of the new covenant, and to the blood of sprinkling, that speaketh better things than that of Abel.”(Hebrews 12:22-24 KJV).
The ones who appear on Mount Zion in Heaven are the Church of the first born. These are the raptured saints. I do not know why you extend your reference Rev.14:1-7. It is actually Rev.14:1-5. There is an earthly Mount Zion, and there is a heavenly Mount Zion. The ones singing standing on the heavenly Mount Zion are the raptured saints.
“And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps: And they sung as it were a new song before the throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth.”(Revelation 14:2-3 KJV).
Their voice is like the voice of many waters. On the other hand, the 144,000 are with Christ on the earthly Mount Zion in Jerusalem, Israel. They are the only ones on Earth who could learn the song sang by those on the heavenly Mount Zion. Why? Because they are redeemed also. This song is the song of the redeemed. That’s why the others on Earth though they heard this song, they could not sing it. The 144,000 Jews are in their natural bodies. They are not yet resurrected. They are sealed for protection from the wrath of God after the Rapture of the saints. If they were in Heaven, they would need no seal inasmuch they are not in the scene of the wrath of God. Seal is for authentication, ownership, security, protection, etc. It serves to distinguish the real McCoy from the fake one. Seals are not needed in Heaven because there are no counterfeits in Heaven.
Remember that the Church Age ended with the Rapture. The 144,000 are sealed with the seal of God before the Rapture(Rev.7:1-8). The innumerable multitude in Rev.7:9-18 are the raptured saints who now appear on Mount Zion in Heaven(Rev.14:2). The 144,000 are redeemed from the Earth. They are firsfruits. The first fruits is the first fruit to be harvested. If they were believers, they could hardly be regarded as firstfruits. They are referred to as firstfruits because they belong to a new dispensation. The dispensation of the Millennium. They are the first redeemed from humanity to enter the Millennium to repopulate the Earth in their natural and mortal bodies. They are in their natural bodies. God’s order of redemption is the Jew first and also the Gentile.
“For I am not ashamed of the gospel of Christ: for it is the power of God unto salvation to every one that believeth; to the Jew first, and also to the Greek.”(Romans 1:16 KJV).
So also is His order of punishment.
“Tribulation and anguish, upon every soul of man that doeth evil, of the Jew first, and also of the Gentile; But glory, honour, and peace, to every man that worketh good, to the Jew first, and also to the Gentile: For there is no respect of persons with God.”(Romans 2:9-11 KJV).
They will later be joined by the remnant of Israel who survived the trumpet judgments and are reconciled to God on day 3 of the 30-Reclamation Period of the Kingdom(Hos.6:1-3; Zech.12:12-14), and Gentiles who survived the wrath of God(7 trumpets and 7 bowls) and are justified at the Sheep And Goat Judgment of the Gentiles who survived the wrath of God(Matt.25:31-46). It is actually on day 3 of the 30-day Reclamation of the Kingdom that the 144,000 Jews appear with Christ on the earthly Mount Zion. Christ rescued them from the Edomite and Judean wildernesses and they marched with Him on foot to the earthly Mount Zion from day 1 to day 2 of the 30-day Reclamation of the Kingdom(Mic.2:13; See graphics). On day 3, the spiritual kingdom of God is complete as the remnants of Israel are saved when they see that their long awaited Messiah has nail pierced hands. The following day which is day 4, the two witnesses are raised from the dead by Christ who is physically present on the earthly Mount Zion with the 144, 000, and the redeemed remnants of Israel(Rev.11:1-12). On day 5, the seventh trumpet is blown, and God Almighty reclaims His rule over the Earth usurped by Satan(Rev.11:15). Remember that the last day of the 70th week on which the two witnesses are killed by the antiMessiah is the completion of the lease to Adam. The seventh day is the Shabbat of the Lord which is the seventh Millennium or simply the Millennium.
Your reference to the resurrection of the Man Child as the 144,000 is misapplication of the scriptures. The Man Child is Jesus whom Satan in the person of Herod the Great attempted to kill as soon as He was born(Matt.2). The Man Child being taken to haven is the ascension of Jesus after His resurrection.
“And there appeared a great wonder in heaven; a woman clothed with the sun, and the moon under her feet, and upon her head a crown of twelve stars: And she being with child cried, travailing in birth, and pained to be delivered. And there appeared another wonder in heaven; and behold a great red dragon, having seven heads and ten horns, and seven crowns upon his heads. And his tail drew the third part of the stars of heaven, and did cast them to the earth: and the dragon stood before the woman which was ready to be delivered, for to devour her child as soon as it was born. And she brought forth a man child, who was to rule all nations with a rod of iron: and her child was caught up unto God, and to his throne. And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days.”(Revelation 12:1-6 KJV).
The pregnant woman with a gravid uterus is Israel. She pained to be delivered. This portion of Revelation is a historical flashback to Palestine in the late First Century BC under Roman domination.
The redeemed saints are the ones standing and singing on the sea of glass which is before the Throne of God in the temple of God in Heaven(Rev.15:2-4). They are the same people as the one in Rev.14:2-3. Only the 144,000 on Earth could learn this song because they are redeemed also. The other Israelites to be redeemed shortly could not learn the song. Neither the beast-marked earth-dwellers nor the unbranded Gentiles could learn the song but the 144,000 only.
All believers alive must enter the 70th week of Daniel to experience the horrors of the Great Tribulation before being raptured after the cosmic and celestial disturbances that terminate the Great Tribulation. I stated that the innumerable multitude in Rev.7:9-17 are the raptured saints in Heaven. They include the fifth seal martyrs(Rev.6:9-11) and those who were beheaded for their faith in Christ(Rev.20:4). These are faithful and uncompromising believers who refused to hide during the Great Tribulation, and went about persuading others not to worship the Beast nor his image nor bear the number of of his name. All believers who are raptured will reign with Christ in the Millennium. That is the simple reason they are referred to as kings. They will also minister to Christ in the Fourth Temple on the renovated and earthly Mount Zion in the Millennium. Therefore, they are also referred to as priests. “And hast made us unto our God kings and priests: and we shall reign on the earth.”(Revelation 5:10 KJV).