Psalms 137:3

“For there they that carried us away captive - The Babylonians. Required of us a song - Asked of us a song. The word does not express the idea of compulsion or force. Margin, as in Hebrew, words of a song. Perhaps the idea is that they did not merely ask music, but they wished to hear the words - the songs themselves - in which they were accustomed to praise God. This may have been a taunt, and the request may have been in derision; or it may have been seriously, and with no desire to reproach them, or to add to their sorrows. We are not to impute bad motives to others where there is no evidence that there are any, and where the supposition of good motives will answer just as well; and the…”

“A song - Such songs as you used to sing in the temple of Zion. Psalms 137:4”

“For there: Psa 123:3, Psa 123:4; Lam 2:15, Lam 2:16 a song: Heb. the words of a song wasted us: Heb. laid us on heaps, Psa 79:1; Neh 4:2; Jer 9:11, Jer 26:18; Mic 3:12; Luk 21:6 the songs of Zion: Psa 9:14, Psa 65:1; Ch1 15:27, Ch1 16:7; Isa 35:10, Isa 51:11; Jer 31:12, Jer 31:13; Rev 14:1-3 Psalms 137:4”