1 Samuel 13:7-9

7And the Hebrews went over the Jordan into the land of Gad and Gilead. And Saul was yet in Gilgal, and all the people followed him trembling.

8And he waited seven days, according to the set time that Samuel [had appointed]; but Samuel did not come to Gilgal; and the people were scattered from him.

9And Saul said, Bring hither to me the burnt-offering and the peace-offerings. And he offered up the burnt-offering.