Genesis 19:6 Meaning

4But before they lay down, the men of the city, even the men of Sodom, compassed the house round, both old and young, all the people from every quarter:

5And they called unto Lot, and said unto him, Where are the men which came in to thee this night? bring them out unto us, that we may know them.

6And Lot went out at the door unto them, and shut the door after him,

7And said, I pray you, brethren, do not so wickedly.

8Behold 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.