Bewail her father and her mother a full month - This is prescribed from motives of humanity, that the woman might have time and leisure to detach her affections from their natural ties, and prepare her mind for new ones.
Related Commentaries of Deuteronomy 21:13
Deuteronomy 21:13
13 And she shall put the raiment of her captivity from off her, and shall remain in thine house, and bewail her father and her mother a full month: and after that thou shalt go in unto her, and be her husband, and she shall be thy wife.