Go, make yet more sure. Know and see the place where his foot is, and who has seen him there, for it is told me that he is very cunning.
Here, 1. The Ziphites offer their service to Saul, to betray David to him, Sa1 23:19, Sa1 23:20. He was sheltering himself in the wilderness of Ziph (Sa1 23:14, Sa1 23:15), putting the more confidence in the people of that country because they were of his own tribe.
Commenting on 1 Samuel 23:19-29
Go, I pray you, prepare yet,.... That is, go home, return to their habitations, and get things in a greater readiness for him; inquire more diligently after David, get more intelligence of him, and inform themselves more exactly about him: and know and see his place where his haunt is; or "foot" (s) is, where that steps and walks most frequently, not only get knowledge...
1Sa 23:22 In his anxiety, however, lest David should escape him after all, he charged them, “Go, and give still further heed (הכין without לב, as in Jdg 12:6), and reconnoitre and look at his place where his foot cometh (this simply serves as a more precise definition of the nominal suffix in מקומו, his place), who hath seen him there (sc., let them inquire...