Sacrificing On Behalf Of A Deceased Person

Narrated Hanash:

I saw Ali sacrificing two rams; so I asked him: What is this? He replied. The Messenger of Allah ﷺ enjoined upon me to sacrifice on his behalf, so that is what I am doing.

حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا شَرِيكٌ، عَنْ أَبِي الْحَسْنَاءِ، عَنِ الْحَكَمِ، عَنْ حَنَشٍ، قَالَ رَأَيْتُ عَلِيًّا يُضَحِّي بِكَبْشَيْنِ فَقُلْتُ مَا هَذَا فَقَالَ إِنَّ رَسُولَ اللَّهِ ﷺ أَوْصَانِي أَنْ أُضَحِّيَ عَنْهُ فَأَنَا أُضَحِّي عَنْهُ .