Is the Udhiyah obligatory upon the financially capable son who lives with his family and contributes to household expenses, knowing that his retired father offers the Udhiyah on behalf of the family with the money the son gives him? And is this Udhiyah sufficient for the son as well, or is a separate Udhiyah obligatory upon him? And what is the ruling on one who contents himself with the Udhiyah of the head of the household?

If a father and son share a residence and expenses, the father's Udhiyah (definition) is sufficient for him and for all his household, based on what was narrated by Abu Ayyub al-Ansari: that a man in the time of the Prophet, peace and blessings be upon him, would sacrifice a sheep on behalf of himself and his household. This is also because the Prophet, peace and blessings be upon him, sacrificed one Udhiyah on behalf of himself and his household. However, if each son lives in a separate house, then he must offer an independent Udhiyah.