Is it obligatory upon the woman to retrn the mahr and gifts that her husbnd gave her during the marriage when taking khula?is it permissible for the husbnd to demand em back or demand more than the mahr as a condition for granting khula? Can I pray 1 rakat witr no qunoot? Is the poo of pigeon najis?

The Mālikīs and the Shāfiʿīs held that it is permissible for the husband to take compensation from his wife in return for separating from her — whether that compensation is equal to what he gave her, or less than it, or more — so long as the two parties have mutually agreed to it … The Ḥanbalīs held that it is not recommended for the husband to take from her more than he gave her; rather, it is forbidden for him to take [anything] if he mistreats her in order to compel her to ransom herself.