1 Samuel 14:33-35

33Someone told Saul, ‘Look at what the army is doing. They are eating meat that still has blood in it. That is a sin against the Lord.’ Saul said to his soldiers, ‘You have turned against the Lord! Find a large stone and roll it here to me.’

34Then Saul said, ‘Go around to tell all the soldiers, “Bring the cows and the sheep here. Kill them properly and eat them here. Do not eat meat which still has blood in it. That is a sin against the Lord.” ’ So that night every soldier brought an animal. They killed their animals on the stone.

35Then Saul built an altar to worship the Lord. It was the first time that he had built an altar for the Lord.