1 Samuel 15:5

(5) A city of Amalek.—Better rendered, The city of Amalek: no doubt, their principal place of arms.

And laid wait in the valley.—Better, in a torrent bed, then dry (Arabic, “Wady”). There is a strange tradition in the Talmud that Saul’s mind misgave him when he came to this “torrent bed;” thus he called to mind the command of Deuteronomy 21:4 to slay an heifer at a torrent in expiation of a murder, and determined not to carry out the stern charge of Samuel, but to spare rather than to slay.