7 'And if the man doth not delight to take his brother's wife, then hath his brother's wife gone up to the gate, unto the elders, and said, My husband's brother is refusing to raise up to his brother a name in Israel; he hath not been willing to perform the duty of my husband's brother;
Matthew Henry's Commentary on Deuteronomy 25:7
Commentary on Deuteronomy 25:5-12
(Read Deuteronomy 25:5-12)
The custom here regulated seems to have been in the Jewish law in order to keep inheritances distinct; now it is unlawful.