I Samuel 14:31-33

Now they had driven back the Philistines that day from Michmash to Aijalon. So the people were very faint. And the people rushed on the spoil, and took sheep, oxen, and calves, and slaughtered them on the ground; and the people ate them with the blood. Then they told Saul, saying, “Look, the people are sinning against the LORD by eating with the blood!” So he said, “You have dealt treacherously; roll a large stone to me this day.”