Now the Spirit of Yahweh departed from Saul, and an evil spirit from Yahweh troubled him.
"When YHWH’s Spirit came upon David his anointer [Samuel] left, leaving him in good hands. When YHWH’s Spirit left Saul an evil spirit came upon him, leaving him in dire straits." [Note: David M. Howard Jr., "The Transfer of Power From Saul to David in 1 Samuel 16:13-14," Journal of the Evangelical Theological Society 32:4 (1989):481.] 