(1) The cave Adullam.--The great valley of Elah forms the highway from Philistia to Hebron. In one especially of the tributary vales or ravines of the Elah valley are many natural caves, some of great extent, roomy and dry, which are still used by the shepherds as dwelling-places, and as refuges for their flocks and herds. David chose one of these natural fastnesses as the temporary home for himself and his followers. The traveller sees that there was ample room for the 400 refugees who gathered under David's skilled leadership. Stanley even speaks of this Adullam Cavern as "a subterranean palace, with vast columnar halls and arched chambers."

The name Adullam was probably given to the largest of these great caverns from its proximity to the old royal Canaanitish city of Adullam (Joshua 15:35), ruins of which on a rounded hill to the south of the cave are still visible.

His brethren and all his father's house.--They of course soon felt the weight of Saul's anger against the prominent hero of their race, and dreading the fate which often overwhelms whole families for the faults of one of the more distinguished members, fled from their homes, and joined David and his armed force of outlaws.

Verse 1. - The cave Adullam. According to Josephus this was situated near a city of the same name ('Ant.,' 6:12, 3), which formed one of a group of fifteen in the Shephelah (see on 1 Samuel 17:1), and its site has now been recovered by Mr. Conder (see 'Tent Work,' 2:156-160). "The great valley," he says, "of Elah, which forms the highway from Philistia to Hebron, runs down northwards past Keilah and Hareth, dividing the low hills of the Shephelah from the rocky mountains of Judah. Eight miles from the valley head stands Shochoh,... and two and a half miles south of this is a very large and ancient terebinth." This stands on "the west side of the vale, just where a small tributary ravine joins the main valley; and on the south of this ravine is a high rounded hill, almost isolated by valleys, and covered with ruins, a natural fortress," the site of the city Adullam. David's cave, he considers, would not be one of the larger caverns, as these are seldom used for habitations; but "the sides of the tributary valley are lined with rows of caves, and these we found inhabited, and full of flocks and herds; but still more interesting was the discovery of a separate cave on the hill itself, a low, smoke-blackened burrow, which was the home of a single family. We could not but suppose, as we entered this gloomy abode, that our feet were standing in the very footprints of the shepherd king, who here, encamped between the Philistines and the Jews, covered the line of advance on the cornfields of Keilah, and was but three miles distant from the thickets of Hareth." After describing the fine view from this hill, which is about 500 feet high, he adds, "There is ample room to have accommodated David's 400 men in the caves, and they are, as we have seen, still inhabited." Thus then David's cave was one of many in the Terebinth valley and the ravine opening into it, and was not far from Gath, though over the border. Here his brethren and all his father's house joined him through fear of Saul. Among these would be Joab, Abishai, and Asahel, his cousins; and we learn how great was the love and enthusiasm which David was able to inspire among them from the feat of the three heroes, of whom Abishai was one, who, while he was in the cave of Adullam, and a garrison of the Philistines at Bethlehem, broke through them to bring David water from the well there (2 Samuel 23:13-17). As Bethlehem was thus held by the Philistines, there was double reason for the flight of Jesse's family; and it is a proof how thoroughly Saul's government had broken down that, while Samuel could maintain a son at Beersheba as judge (1 Samuel 8:24 Saul was unable to defend places so much more distant from the Philistine border.

22:1-5 See what weak instruments God sometimes uses, to bring about his own purposes. The Son of David is ready to receive distressed souls, who will be commanded by him. He receives all who come unto Him, however vile and miserable; he changes them into a holy people, and employs them in his service: those who would reign with him must be contented first to suffer with and for him. Observe with what tender concern David provided for his aged parents. The first thing he does is to find them a quiet habitation, whatever became of himself. Let children learn to honour their parents, in every thing consulting their ease and satisfaction. Though highly preferred, and much employed, let them not forget their aged parents. The steps of a good man are ordered by the Lord. And the Lord will preserve his people for their appointed work, however they may be hated and exposed.David therefore departed from thence,.... From Gath, being driven by Achish from his court, and let go by his servants, and glad he was of the deliverance:

and escaped to the cave Adullam; which was no doubt near to a city of the same name in the tribe of Judah, of which See Gill on Joshua 15:35; this being a strong place, and in his own tribe, he might hope to be in greater safety; here he penned his hundred forty second psalm, see Psalm 142:1,

and when his brethren and all his father's house heard it; that he was come thither:

they went down thither to him; to visit and comfort him, counsel and assist him all they could; and chiefly to secure themselves from the rage and malice of Saul, who they might fear would fall upon them, and avenge himself on them for David's sake.