1 Samuel 13:7-9

7Also 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].

8Now 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.

9So Saul said, “Bring me the burnt offering and the peace offerings.” And he offered the burnt offering [which he was forbidden to do].