John Gill Commentary 1 Samuel 19:12

"So Michal let David down through the window: and he went, and fled, and escaped." — 1 Samuel 19:12 (ASV)

So Michal let David down through a window
In like manner as Rahab let down the spies from her house in Jericho, when the king's messengers were in quest of them, (Joshua 2:15) ; and as the disciples let down the Apostle Paul at Damascus, to preserve him from the designs of the Jews upon him:

and he went, and fled, and escaped ;
he departed from his house, and ran with all the haste he could, and escaped the messengers that had beset the house, and were waiting for him.