The Prayer of the Two Eids
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 79
وَ خَطَبَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ فِي عِيدِ اَلْأَضْحَى فَقَالَ: « اَللَّهُ أَكْبَرُ اَللَّهُ أَكْبَرُ لاَ إِلَهَ إِلاَّ اَللَّهُ وَ اَللَّهُ أَكْبَرُ اَللَّهُ أَكْبَرُ وَ لِلَّهِ اَلْحَمْدُ اَللَّهُ أَكْبَرُ عَلَى مَا هَدَانَا وَ لَهُ اَلشُّكْرُ فِيمَا أَوْلاَنَا وَ اَلْحَمْدُ لِلَّهِ عَلَى مَا رَزَقَنَا مِنْ بَهِيمَةِ اَلْأَنْعَامِ.
The Commander of the Faithful Imam Ali ibn Abi Talib عليه السلام delivered a sermon on Eid al-Adha, saying: "Allah سبحانه وتعالى is the Greatest, Allah سبحانه وتعالى is the Greatest. There is no deity but Allah سبحانه وتعالى. Allah سبحانه وتعالى is the Greatest, Allah سبحانه وتعالى is the Greatest, and all praise belongs to Allah سبحانه وتعالى. Allah سبحانه وتعالى is the Greatest for guiding us, and to Him belongs gratitude for what He has granted us. All praise belongs to Allah سبحانه وتعالى for what He has provided us from the sacrificial animals."
- Ṣaḥīḥ al-Faqīh