Ezekiel 4:14-15

14Then I said, ‘No, Almighty Lord, I could not use human dung. It would make me unclean. Since I was a child I have never eaten any food that would make me unclean. I have never eaten meat from a dead animal that people have found. I have not eaten meat from an animal that wild animals have killed.’

15So God said to me, ‘I will allow you to use dung from cows instead of from humans. You may use that to make the fire to cook your bread.’