Genesis 19:8

Behold now, I have two daughters which have not known man; let me, I pray you, bring them out unto you, and do ye to them as is good in your eyes; only unto these men do nothing, for therefore came they under the shadow of my roof. So sacred were the persons and the lives of his guests in the eyes of Lot that he was willing to set aside even his fatherly feeling and duty and to sacrifice his daughters to the lust of the brutes out in the street, if the latter would but be satisfied. As for the guests, he reminds the mob of the duty of hospitality; for it was in order to be sheltered against danger and wickedness that they had entered his house. To try to hinder a sin by committing sin can never be excused, and the fact of Lot's offer may be accounted for only by the fact of his extreme consternation.