1 Samuel 13:8-10

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].

10As soon as he finished offering the burnt offering, Samuel finally came; Saul went out to meet and to welcome him.