1 Samuel 13:5-10

Now the Philistines gathered to fight against Israel, 30,000 chariots and 6,000 horsemen, and troops in multitude, like sand on the seashore. They came up and camped at Michmash, east of Beth-aven. When the men of Israel saw that they were in a tight situation (for their troops were hard-pressed), they hid in caves, in thickets, in cellars, and in [dry] cisterns (pits). Also some of the Hebrews had crossed the [river] Jordan to the land of Gad and Gilead. As for Saul, he was still in Gilgal, and all the people followed him, trembling [in fear and anticipation]. Now Saul waited seven days, according to the appointed time which Samuel had set, but Samuel had not come to Gilgal; and the people were scattering away from Saul. So Saul said, “Bring me the burnt offering and the peace offerings.” And he offered the burnt offering [which he was forbidden to do]. As soon as he finished offering the burnt offering, Samuel finally came; Saul went out to meet and to welcome him.