Genesis 18:7

Yet he pressed them strongly, so they turned aside to him and entered his house; and he made a feast for them and baked unleavened bread, and they ate.

So Gideon went in and prepared a young goat and unleavened bread from an ephah of flour; he put the meat in a basket and the broth in a pot and brought them out to him under the oak and presented them.

And the woman had a fattened calf in the house, and she quickly sacrificed it; and she took flour, kneaded it, and baked unleavened bread from it.

Do not neglect to show hospitality to strangers, for by this some have entertained angels without knowing it.