Verses 2-4. - Saul took him that day. Bent solely on war, Saul gladly took so promising, a young soldier as David to be one of his bodyguard (1 Samuel 14:52), and henceforward he was constantly with him. Thus in two ways, first as a musician, and now as a soldier, David was forced into those intimate relations with Saul, which ended so tragically. For a while, however, those happier results ensued summed up in 1 Samuel 16:21. Jonathan and David made a covenant. We are not to suppose that this happened immediately. David continued on friendly terms with Saul for a considerable period, during which he went on many expeditions, and grew in military renown (see ver. 5). And thus the love which began with admiration of David's prowess grew deeper and more confirmed by constant intercourse, till this solemn bond of mutual friendship was entered into by the two youthful heroes, by which they bound themselves under all circumstances to be true and faithful to one another. How nobly Jonathan kept the bond the history proceeds immediately to tell us; nor was David subsequently unmindful of it (2 Samuel 9:l, 7). Jonathan stripped himself of the robe, etc. In confirmation of the bond Jonathan gave David first his robe, the meil, which, as we have seen on 1 Samuel 2:19, was the ordinary dress of the wealthier classes; and next his garments, his military dress (see on 1 Samuel 17:38, 39), worn over the meil, and which here seems to include his accoutrements, - the bow, sword, and girdle, - though elsewhere distinguished from them (2 Samuel 20:8). In thus clothing David in his own princely equipments Jonathan was showing his friend the greatest personal honour (Esther 6:8), and such a gift is still highly esteemed in the East.

18:1-5 The friendship of David and Jonathan was the effect of Divine grace, which produces in true believers one heart and one soul, and causes them to love each other. This union of souls is from partaking in the Spirit of Christ. Where God unites hearts, carnal matters are too weak to separate them. Those who love Christ as their own souls, will be willing to join themselves to him in an everlasting covenant. It was certainly a great proof of the power of God's grace in David, that he was able to bear all this respect and honour, without being lifted up above measure.And Saul took him that day,.... Not only into his favour, and into his service, but into his court; even on that very day he slew the Philistine, or however as soon as it could be done:

and would let him go no more home to his father's house; as he used to do before; when he only served as a musician to him, then he was only at court when Saul was in a melancholy disposition, and wanted him, and so was going and returning, and in the intervals kept his father's sheep, 1 Samuel 17:15; but now he would not suffer him to attend such business any longer, since he was not only to become a courtier, and be made a prince or noble, but to marry his daughter, according to the declaration he had made, with respect to any man that should kill Goliath.