'Play the Harlot' in the Bible

These, when they were young, began to play the harlots in Egypt. There were their breasts bruised, and the paps of their maidenhead destroyed.

Though thou, Israel, are disposed to play the harlot, yet shouldest not thou have offended, O Judah. Thou shouldest not have run to Gilgal, nor gone up to Bethaven, nor have sworn, 'The LORD liveth.'