The number 144,000 has religious significance for Christians because of its use in the Book of Revelation of the New Testament, where it appears three times:

Revelation 7:3–8 (ESV)

saying: "Do not harm the earth or the sea or the trees, until after we have sealed the servants of God on their foreheads." And I heard the number of the sealed, a hundred and 144,000, sealed from every tribe of the sons of Israel:
12,000 from the tribe of Judah were sealed,
12,000 from the tribe of Reuben,
12,000 from the tribe of Gad,
12,000 from the tribe of Asher,
12,000 from the tribe of Naphtali,
12,000 from the tribe of Manasseh,
12,000 from the tribe of Simeon,
12,000 from the tribe of Levi,
12,000 from the tribe of Issachar,
12,000 from the tribe of Zebulun,
12,000 from the tribe of Joseph,
12,000 from the tribe of Benjamin were sealed.

Revelation 14:1 (ESV)

Then I looked, and behold, on Mount Zion stood the Lamb, and with him 144,000 who had his name and his Father's name written on their foreheads.

Revelation 14:3–5 (ESV)

And they were singing a new song before the throne and before the four living creatures and before the elders. No one could learn that song except the 144,000 who had been redeemed from the earth. For it is these who have not defiled themselves with women, for they are virgins. It is these who follow the Lamb wherever he goes. These have been redeemed from mankind as firstfruits for God and the Lamb, and in their mouth no lie was found, for they are blameless.

The numbers 12,000 and 144,000 are variously interpreted in traditional Christianity. Some, taking the numbers in Revelation to be symbolic,[1] believe it represents all of God's people throughout history in the heavenly Church.[2] One suggestion is that the number comes from 12, a symbol for totality, which is squared and multiplied by one thousand for more emphasis. Others insist the numbers 12,000 and 144,000 are literal numbers and representing either descendants of Jacob (also called Israel in the Bible) or others to whom God has given a superior destiny with a distinct role at the time of the end of the world.[3] One understanding is that the 144,000 are recently converted Jewish evangelists sent out to bring sinners to Jesus Christ during the seven year tribulation period.[4] Preterists believe they are Jewish Christians, sealed for deliverance from the destruction of Jerusalem in 70 A.D. Dispensationalist Tim LaHaye, in his commentary Revelation: Illustrated and Made Plain (Zondervan, 1975), considers the 144,000 in Revelation 7 to refer to Jews and those in Revelation 14 to refer to Christians.[5]