The 144,000 are the sealed servants of God in Revelation 7:4 (12,000 from each of twelve tribes) and 14:1-5 (the redeemed who follow the Lamb wherever He goes). The number is symbolic (12 tribes × 12,000) representing covenant completeness. Identifications proposed: literal Israelite remnant, the entire redeemed church (with the great multitude of 7:9 as the same group from a different angle), or a particular group within the redeemed.
(Revelation 7; 14.) Symbolic number of God's sealed servants; 12 tribes × 12,000.
Revelation 7:1-8 lists the tribes (with Manasseh replacing Dan, and Joseph in place of Ephraim). 14:1-5 describes them as virgins (literal or spiritually undefiled), as those who follow the Lamb, redeemed from the earth, firstfruits unto God and the Lamb.
Most Reformed and Catholic interpreters read the number symbolically (the church in covenant fullness); dispensational interpreters often read it literally (a specific Jewish remnant); various sects (Jehovah's Witnesses) have invented their own readings.
Revelation 7:4 — "And I heard the number of them which were sealed: and there were sealed an hundred and forty and four thousand of all the tribes of the children of Israel."
Revelation 14:1 — "And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads."
Revelation 14:4 — "These are they which were not defiled with women; for they are virgins. These are they which follow the Lamb whithersoever he goeth."
Revelation 14:5 — "And in their mouth was found no guile: for they are without fault before the throne of God."
Modern sect literature has obscured the simple symbolic reading; the number reads naturally as covenant completeness in apocalyptic numerology.
Apocalyptic literature regularly uses round symbolic numbers: 7 (completeness), 12 (covenant), 1,000 (vast). 144,000 = 12 × 12 × 1,000 = covenant completeness in fullness. The literal reading is possible but burdens the text with implications most apocalyptic numerology does not support.
The household's appreciation of biblical numerology helps. Numbers in Scripture often signify; not always, but often. Reading them with the genre is part of reading the genre well.
Symbolic apocalyptic numerology.
Greek hekaton tessarakonta tessares chiliades — one hundred forty-four thousand.
Note: chilias is the same root behind millennium.
"12 × 12 × 1,000 — covenant completeness in fullness."
"Apocalyptic numbers signify before they count."
"Symbolic reading is the dominant historic interpretation."