Usurpation in Religious Affairs by King Saul, in Assuming Priestly Functions
Source: Nav
1 Samuel 13:8–14
And Saul waited seven days for the time appointed by Samuel, but Samuel did not come to Gilgal, and the troops began to desert Saul. / So he said, “Bring me the burnt offering and the peace offerings.” And he offered up the burnt offering. / Just as he finished offering the burnt offering, Samuel arrived, and Saul went out to greet him.