And Michal took an image, and laid it in the bed, and put a pillow of goats' hair for his bolster, and covered it with a cloth.

Wesley's Notes

19:13 Goats hair - Or, put great goats hair upon his bolster; upon the head and face of the image, which lay upon his bolster, that it might have some kind of resemblance of David's head and hair, at least in a sick man's bed, where there useth to be but a glimmering light. Covered it - Upon pretence of his being sick, and needing some such covering.

King James Translators' Notes

image: Heb. teraphim

Jamieson-Fausset-Brown Bible Commentary

13, 14. And Michal took an image, and laid it in the bed-"an image," literally, "the teraphim," and laid, not in the bed, but literally on the "divan"; and "the pillows," that is, the cushion, which usually lay at the back of the divan and was stuffed with "goat's hair," she took from its bolster or heading at the upper part of the divan. This she placed lower down, and covered with a mantle, as if to foster a proper warmth in a patient; at the same time spreading the goat's hair skin, so as to resemble human hair in a dishevelled state. The pretext was that David lay there sick. The first messengers of Saul, keeping at a respectable distance, were deceived; but the imposition was detected on a closer inspection.

Matthew Henry's Concise Commentary

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.