IMĀM ‘UTHAYMĪN WAS ASKED...
If a father has children and some of them are married, is the slaughtering of the father for his sons sufficient although some of them have wives?
If (all) the family are in the same house, it is sufficient to slaughter one animal (for everybody). If all those sons are in separate houses (of their own), it is upon each of them to slaughter (for their own households) because the slaughter of their father (in this case) is not sufficient for them.
