John Gill Commentary Judges 19:23

"And the man, the master of the house, went out unto them, and said unto them, Nay, my brethren, I pray you, do not so wickedly; seeing that this man is come into my house, do not this folly." — Judges 19:23 (ASV)

And the man, the master of the house, went out to them
Opened the door, and went out to converse with them, and spoke to them in this manner:

and said to them, nay, my brethren, nay, I pray you, do not so
wickedly ;
it is plain he understood them in such a sense that they meant not mere knowledge of the man (as to who he was), but to commit the most abominable wickedness; so great that its wickedness cannot be adequately described; and to dissuade from it, he uses the most tender language, and the most earnest entreaties:

seeing this man is come into my house, do not this folly ;
he argues from the law of hospitality, which ought not to be infringed; a man being obliged to protect a stranger under his roof; and from the nature of the crime, which was folly, stupidity, and what was abominable to the last degree.