1 Samuel 19:7-17

7 Jonathan told David all of this. Then Jonathan took David to Saul. So David was returned to his former status in Saul's court.
8 When war broke out again, David went to fight the Philistines. He defeated them so decisively that they fled from him.
9 Then an evil spirit from the LORD came over Saul while he was sitting in his house with his spear in his hand. David was strumming a tune.
10 Saul tried to nail David to the wall with his spear. But David dodged it, and Saul's spear struck the wall. David fled, escaping [from Saul] that night.
11 Saul sent messengers to watch David's house and kill him in the morning. But Michal, David's wife, advised him, "If you don't save yourself tonight, you'll be dead tomorrow!"
12 So Michal lowered David through a window, and he ran away to escape.
13 Then Michal took some idols, laid them in the bed, put a goat-hair blanket at its head, and covered the idols with a garment.
14 When Saul sent messengers to get David, Michal said, "He's sick."
15 Then Saul sent the messengers back to see David themselves. Saul told them, "Bring him here to me in his bed so that I can kill him."
16 The messengers came, and there in the bed were the idols with the goat-hair blanket at its head.
17 Saul asked Michal, "Why did you betray me by sending my enemy away so that he could escape?" Michal answered, "He told me, 'Let me go! Why should I kill you?'"