1 Samuel 13:5-15

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. But Samuel said, “What have you done?” Saul said, “Since I saw that the people were scattering away from me, and that you did not come within the appointed time, and that the Philistines were assembling at Michmash, therefore, I said, ‘Now the Philistines will come down against me at Gilgal, and I have not asked for the LORD’S favor [by making supplication to Him].’ So I forced myself to offer the burnt offering.” Samuel said to Saul, “You have acted foolishly; you have not kept the commandment of the LORD your God, which He commanded you, for [if you had obeyed] the LORD would have established your kingdom over Israel forever. But now your kingdom shall not endure. The LORD has sought out for Himself a man (David) after His own heart, and the LORD has appointed him as leader and ruler over His people, because you have not kept (obeyed) what the LORD commanded you.” Then Samuel arose and went up from Gilgal to Gibeah of Benjamin. And Saul assembled and counted the people who were still with him, [only] about six hundred [fighting] men.