The Prophet (ﷺ) used to say during the slaughter-
بِسْمِ اللَّهِ وَاللَّهُ أَكْبَرُ هَذَا عَنِّي وَعَمَّنْ لَمْ يُضَحِّ مِنْ أُمَّتِي
Pronunciation
Bismillah-hi wallahu akbaru haza 'anni wa amman lam udahh-hi min ummati
Meaning
In the name of Allah, Allah is Most Great. This is from me and from those who did not sacrifice from my community.
Source: Sahih. Abu Dawud: 2810
Read the hadith
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا يَعْقُوبُ، - يَعْنِي الإِسْكَنْدَرَانِيَّ - عَنْ عَمْرٍو، عَنِ الْمُطَّلِبِ، عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ، قَالَ شَهِدْتُ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم الأَضْحَى بِالْمُصَلَّى فَلَمَّا قَضَى خُطْبَتَهُ نَزَلَ مِنْ مِنْبَرِهِ وَأُتِيَ بِكَبْشٍ فَذَبَحَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم بِيَدِهِ وَقَالَ " بِسْمِ اللَّهِ وَاللَّهُ أَكْبَرُ هَذَا عَنِّي وَعَمَّنْ لَمْ يُضَحِّ مِنْ أُمَّتِي " .
Narrated Jabir ibn Abdullah: I witnessed sacrificing along with the Messenger of Allah (ﷺ) at the place of prayer. When he finished his sermon, he descended from his pulpit, and a ram was brought to him. The Messenger of Allah (ﷺ) slaughtered it with his hand, and said: In the name of Allah, Allah, is Most Great. This is from me and from those who did not sacrifice from my community. [Sahih (Albani). Abu Dawud: 2810]
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset