Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

After these encouraging words, they two made a covenant before Jehovah: i.e., they renewed the covenant which they had already made by another solemn oath; after which Jonathan returned home, but David remained in the wood. The treachery of the Ziphites forms a striking contrast to Jonathan's treatment of David. They went up to Gibeah to betray to Saul the fact that David was concealed in the wood upon their mountain heights, and indeed "upon the hill Hachilah, which lies to the south of the waste." The hill of Ziph is a flattened hill standing by itself, of about a hundred feet in height. "There is no spot from which you can obtain a better view of David's wanderings backwards and forwards in the desert than from the hill of Ziph, which affords a true panorama. The Ziphites could see David and his men moving to and fro in the mountains of the desert of Ziph, and could also perceive how he showed himself in the distance upon the hill Hachilah on the south side of Ziph (which lies to the right by the desert); whereupon they sent as quickly as possible to Saul, and betrayed to him the hiding-place of his enemy" (v. de Velde, ii. pp. 104-5). Jeshimon does not refer here to the waste land on the north-eastern coast of the Dead Sea, as in Num 21:20; Num 23:28, but to the western side of that sea, which is also desert. Sa1 23:20 reads literally thus: "And now, according to all the desire of thy soul, O king, to come down (from Gibeah, which stood upon higher ground), come down, and it is in us to deliver him (David) into the hand of the king."