Treasury of Scripture Knowledge
And if the man like not to take his brother's wife, then let his brother's wife go up to the gate unto the elders, and say, My husband's brother refuseth to raise up unto his brother a name in Israel, he will not perform the duty of my husband's brother.
then his father and mother shall seize him, and bring him out to the elders of his city
at the gateway of his hometown.
Now Boaz went up to the gate and sat down there, and behold,
the close relative of whom Boaz spoke was passing by, so he said, “Turn aside, friend, sit down here.” And he turned aside and sat down.
Then Judah said to Onan, “
Go in to your brother’s wife, and perform your duty as a brother-in-law to her, and raise up offspring for your brother.”
and they questioned Him, saying, “Teacher, Moses wrote for us that
if a man’s brother dies, having a wife, and he is childless, his brother should marry the wife and raise up children to his brother.