1 Samuel 19:11 in the King James Version
Saul also sent messengers unto David’s house, to watch him, and to slay him in the morning: and Michal David’s wife told him, saying, If thou save not thy life to night, to morrow thou shalt be slain.
Context
10 Saul sought to pin David to the wall with the spear, but he slipped away out of Saul’s presence; and he stuck the spear into the wall. David fled and escaped that night.
11 Saul sent messengers to David’s house to watch him and to kill him in the morning. Michal, David’s wife, told him, saying, “If you don’t save your life tonight, tomorrow you will be killed.”
12 So Michal let David down through the window. He went away, fled, and escaped.