וְאִם־לִבְנ֖וֹ יִֽיעָדֶ֑נָּה כְּמִשְׁפַּ֥ט הַבָּנ֖וֹת יַעֲשֶׂה־לָּֽהּ׃
And if he espouse her unto his son, he shall deal with her after the manner of daughters.
Read kabbalistic (mystical) interpretation of Exodus 21:9: and classical mystical sources.