Dirty Bread

Judges 13
2 A certain man of Zorah, named Manoah, from the clan of the Danites, had a wife who was sterile and remained childless. 3 The angel of the LORD appeared to her and said, "You are sterile and childless, but you are going to conceive and have a son. 4 Now see to it that you drink no wine or other fermented drink and that you do not eat anything unclean, 5 because you will conceive and give birth to a son. No razor may be used on his head, because the boy is to be a Nazirite, set apart to God from birth, and he will begin the deliverance of Israel from the hands of the Philistines."

ME, to the kids:
What foods did the angel of the Lord instruct Manoah's wife not to eat?

James (age 8), waving hand:
Ooh, ooh, I know! Wine, and ummmm..... DIRTY BREAD!

The rest of us, looking confused:
????.... OH! (realization dawns) Unclean food!