Uhh, this sounds literally like clothes washing instructions. Mixed with just general ancient misogyny. Ancient religious texts are filled with this sort of passages that are just general instructions about how to properly carry out mundane daily life tasks.

This is in the context of the prophet, having a baby sat on his lap, got peed on. This is the little gem of ancient wisdom he delivered. Girl pee, get this off me and wash it at once. Boy pee, just let it be for a while, sprinkle it a bit with water and that’s it.

This one comes from the same book that tells that a servant had to wash dried semen from the prophet clothes. Religious texts can be very wild.