I have an oath to expiate, so is it permissible for me to feed from the meat of the sacrificial animal?

It is not permissible to give out the meat of the sacrificial animal (Uḍḥiyah) with the intention of expiating an oath (kaffārat al-yamīn), because it was offered to Allah, so it should not be used to fulfill another obligation. Rather, it is for eating, giving in charity, and gifting. Al-Hasan disliked this.