Is Udhiyah Obligatory?

Is it permissible for fewer than seven people to share in a cow for udhiyah?

If the head of the household refuses to offer an udhiyah, can a woman offer an udhiyah on behalf of herself and the members of her household?

Is it permissible for a person to have less than a one-seventh share in the sacrifice (udhiyah) of a cow?

Offering Udhiyah on Behalf of the Prophet

Did the Prophet (blessings and peace of Allah be upon him) always choose a castrated animal for the udhiyah?

If the udhiyah dies before it can be slaughtered

Ruling on offering udhiyah on behalf of the dead and on behalf of the Prophet (blessings and peace of Allah be upon him)

How many times did the Messenger of Allah (blessings and peace of Allah be upon him) offer the udhiyah?

The udhiyah in his country is very expensive; can he send money to do the udhiyah in another country?