Hisnul Muslim 246

When slaughtering or offering a sacrifice

بِسْمِ اللَّهِ وَاللَّهُ أَكْبَرُ اللَّهُمَّ مِنْكَ ولَكَ اللَّهُمَّ تَقَبَّلْ مِنِّي

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.