– One Udhiyah is sufficient on behalf of a man and the members of his household
– Ud-hiyah offered by your father is not sufficient for you if you are living with your family in a separate house
What is the ruling on Ud-hiyah?
A: The Ud-hiyah is a Sunnah (supererogatory act of worship following the example of the Prophet), not Wajib (obligatory), and one sheep is sufficient on behalf of a man and the members of his household, because the Prophet (peace be upon him) used to sacrifice two-horned rams that were white speckled with black, every year; one on behalf of himself and the members of his household, and the other on behalf of those among his Ummah (nation based on one creed) who believe in the Oneness of Allah.
If you are living in a separate house, then the Ud-hiyah offered by your father on behalf of himself and the members of his household is not sufficient for you, because you are not living with them in the same house. It is prescribed for you to offer Ud-hiyah on behalf of yourself and your family. There is nothing wrong with a Muslim taking a loan to offer Ud-hiyah if he is able to repay it. May Allah grant us all success
Source: Fatwas of Ibn Baz
Shaykh Muhammad ibn ‘Uthaymeen (may Allaah have mercy on him) said:
The basic principle concerning the udhiyah (sacrifice)is that it is prescribed for the living, as the Messenger of Allaah (sallallahu alaihi wa sallam) and his companions used to offer the sacrifice on behalf of themselves and their families. With regard to what some of the common folk think, that the sacrifice may be offered on behalf of the dead, there is no basis for that.
Udhiyah on behalf of the dead may be of :
1 – When it is offered on their behalf as well as on behalf of the living, such as when a man offers a sacrifice on behalf of himself and the members of his family, and intends thereby both those who are alive and those who are dead. This is permissible, and the basis of that is the fact that the Prophet (sallallahu alaihi wa sallam) offered the sacrifice on behalf of himself and the members of his family, some of whom had previously died. One animal.
2 – Offering the sacrifice on behalf of the dead in fulfillment of their last wishes (wasaaya). This is obligatory except in the case of one who is unable to do it. The basis for this is the verse in which Allaah says (interpretation of the meaning):
“Then whoever changes the bequest after hearing it, the sin shall be on those who make the change. Truly, Allaah is All-Hearer, All-Knower”