1 Samuel 14:33-35

33Someone reported to Saul, “Look, the men are sinning against the Lord by eating meat that still has blood in it.” “That is very wrong,” Saul said. “Find a large stone and roll it over here.

34Then go out among the troops and tell them, ‘Bring the cattle, sheep, and goats here to me. Kill them here, and drain the blood before you eat them. Do not sin against the Lord by eating meat with the blood still in it.’” So that night all the troops brought their animals and slaughtered them there.

35Then Saul built an altar to the Lord; it was the first of the altars he built to the Lord.