Final answer:
Saul's disobedience to the divine command to abolish the Moabites caused Yahweh to reject him as king in the biblical book of Samuel.
Step-by-step explanation:
Saul's disobedience of the divine command to abolish the Moabites caused Yahweh to reject him as king. The Moabites were one of the peoples living in the region of Canaan at the time of the Hebrews. In the biblical book of Samuel, Saul's failure to completely eliminate the Moabites is depicted as a disobedience to Yahweh and leads to his downfall.