C. F. Keil and Franz Delitzsch on 1 Samuel 23:22

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 into this, that they may not be deceived by uncertain or false reports): for it is told me that he dealeth very subtilly.”