Psalms 137:3

For there they that carried us away captive required of us a song, either out of curiosity or in derision; and they wasted us, those who had inflicted pain upon them, their oppressors, required of us mirth, an expression of happiness, saying, Sing us one of the songs of Zion. The enemies did not realize how tactless they were, and did not care whether the compliance of the Jews with their request would agree with their depressed feelings or not. They had heard of the wonderful hymns of the Jews and insisted upon being entertained by them. But the resentment and the bitterness of the captives kept them from complying with the request addressed to them.