Let David down through a window - As Saul's messengers were sent to David's house to watch him, they would naturally guard the gate, or lie in wait in that place by which David would come out. Michal, seeing this let him down to the ground through a window probably at the back part of the house; and there being neither entrance nor issue that way, the liers in wait were easily eluded.

So Michal (e) let David down through a window: and he went, and fled, and escaped.
(e) Thus God moved both the son and daughter of this tyrant to favour David against their father.

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.