12 And Michal let David down through a window; and he went, and fled and escaped. 13 And Michal took the image, and laid it in the bed, and put the net of goats' [hair] at its head, and covered it with the coverlet. 14 And Saul sent messengers to take David, and she said, He is sick. 15 And Saul sent the messengers to see David, saying, Bring him up to me in the bed, that I may put him to death. 16 And the messengers came in, and behold, the image was in the bed, and the net of goats' [hair] at its head. 17 Then Saul said to Michal, Why hast thou deceived me so, and sent away mine enemy, that he is escaped? And Michal said to Saul, He said to me, Let me go; why should I slay thee?
18 And David fled, and escaped, and came to Samuel to Ramah, and told him all that Saul had done to him. And he and Samuel went and dwelt in Naioth.
Matthew Henry's Commentary on 1 Samuel 19:12-18
Commentary on 1 Samuel 19:11-24
(Read 1 Samuel 19:11-24)
Michal's stratagem to gain time till David got to a distance was allowable, but her falsehood had not even the plea of necessity to excuse it, and manifests that she was not influenced by the same spirit of piety which had dictated Jonathan's language to Saul. In flying to Samuel, David made God his refuge. Samuel, as a prophet, was best able to advise him what to do in this day of distress. He met with little rest or satisfaction in Saul's court, therefore went to seek it in Samuel's church. What little pleasure is to be had in this world, those have who live a life of communion with God; to that David returned in the time of trouble. So impatient was Saul after David's blood, so restless against him, that although baffled by one providence after another, he could not see that David was under the special protection of God. And when God will take this way to protect David, even Saul prophesies. Many have great gifts, yet no grace; they may prophesy in Christ's name, yet are disowned by him. Let us daily seek for renewing grace, which shall be in us as a well of water springing up into everlasting life. Let us cleave to truth and holiness with full purpose of heart. In every danger and trouble, let us seek protection, comfort, and direction in God's ordinances.