Revelation 14:3
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 14:3)
Redeemed.
 Gr. agorazō, “to buy,” “to purchase.” The word is translated “buy” in chs. 3:18; 18:11. Compare the phrases “redeemed us to God” (ch. 5:9), “redeemed from among men” (ch. 14:4). Compare on Rom. 3:24; 1 Cor. 6:20.
No man could learn.
The experience is of such a personal nature that only those who pass through it can appreciate its significance. To them the song is a treasured and comprehensive summation of the experiences through which they have passed in the closing stages of the conflict between good and evil.
Elders.
 See on ch. 4:4.
Before the four beasts.
 See on ch. 4:6.
The throne.
 The throne has earlier been introduced (ch. 4:2).
Sung.
 Literally, “sing.” The narrative is told in the dramatic present tense (cf. on ch. 13:11).