“Teacher, Moses wrote for us [a law] that if a man’s brother dies and leaves a wife but leaves no child, his brother is to marry the widow and raise up children for his brother.

and they questioned Him, saying, “Teacher, Moses wrote for us [a law that] if a man’s brother dies, leaving a wife and no children, his brother should marry the wife and raise children for his brother.

saying, “Teacher, Moses said, ‘If a man dies, leaving no children, his brother as next of kin shall marry his widow, and raise children for his brother.’

and that [in this matter of sexual misconduct] no man shall transgress and defraud his brother because the Lord is the avenger in all these things, just as we have told you before and solemnly warned you.

For through your knowledge (spiritual maturity) this weak man is ruined [that is, he suffers in his spiritual life], the brother for whom Christ died.