The Ziphites were of David's own tribe, though for this their unnatural and strange carriage to him he calls them strangers, Psalms 44:3.
Related Commentaries of 1 Samuel 23:19
1 Samuel 23:19
19 Then came up the Ziphites to Saul to Gibeah, saying, Doth not David hide himself with us in strong holds in the wood, in the hill of Hachilah, which is on the south of Jeshimon?