Then I looked, and there was the Lamb standing on Mount Zion; with him were 144,000 people who have his name and his Father's name written on their foreheads. 1
References for Revelation 14:1
14.1 Ez 9.4; Rev 7.3.
And I heard a voice from heaven that sounded like a roaring waterfall, like a loud peal of thunder. It sounded like the music made by musicians playing their harps. 2
References for Revelation 14:2
+214.2 2 Esd 6.17.
The 144,000 people stood before the throne, the four living creatures, and the elders; they were singing a new song, which only they could learn. Of the whole human race they are the only ones who have been redeemed.
They are the men who have kept themselves pure by not having sexual relations with women; they are virgins. They follow the Lamb wherever he goes. They have been redeemed from the rest of the human race and are the first ones to be offered to God and to the Lamb.
They have never been known to tell lies; they are faultless. 3
References for Revelation 14:5