What to say when slaughtering or sacrificing an
animal
بِسْمِ اللهِ واللهُ أَكْبَرُ اللَّهُمَّ مِنْكَ ولَكَ
اللَّهُمَّ تَقَبَّلْ مِنِّي
246. Bismillaahi wallaahu 'Akbar [Allaahumma minka wa laka] Allaahumma
taqabbal minnee.
With
the Name of Allah, Allah is the Most Great! [O Allah, from You and to
You.] O Allah, accept it from me.
Reference: Muslim 3/
1557, Al-Bayhaqi 9/287.