Thematic Bible: Is reproved by samuel for usurping the priestly functions

But Samuel said, "What have you done?" And Saul said, "Because I saw that the people were scattering from me, and that you did not come within the appointed days, 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 the favor of the LORD.' So I forced myself and offered 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 now the LORD would have established your kingdom over Israel forever. read more.
"But now your kingdom shall not endure The LORD has sought out for Himself a man after His own heart, and the LORD has appointed him as ruler over His people, because you have not kept what the LORD commanded you."