They should sing if thet they were bent.
Chaucer.
Sing (?), v. t. 1. To utter with musical inflections or modulations of
voice.
And they sing the song of Moses, the servant of God, and the song
of the Lamb.
Rev. xv. 3.
And in the darkness sing your carol of high praise.
Keble.
2. To celebrate is song; to give praises to in verse; to relate or
rehearse in numbers, verse, or poetry. Milton.
Arms and the man I sing.
Dryden.
The last, the happiest British king, Whom thou shalt paint or I
shall sing.
Addison.
3. To influence by singing; to lull by singing; as, to sing a child to
sleep.