The Messenger of Allah ﷺ was asked which deeds are the most excellent. He replied, "Raising the voice in talbiyah and the shedding of sacrificial blood."
حدثنا إبراهيم بن المنذر الحزامي ويعقوب بن حميد بن كاسب قالا حدثنا ابن أبي فديك عن الضحاك بن عثمان عن محمد بن المنكدر عن عبد الرحمن بن يربوع
أن رسول الله ﷺ سئل أي الأعمال أفضل قال العج والثج
Its isnad is daif. Tirmidhi narrated it in the chapter on Hajj, in the section on what has been said about the merit of talbiyah and sacrifice, hadith no. 827, from the hadith of Ibn Abu Fudayk, with this chain, and he said, "Gharib, and Muhammad bin Munkadir did not hear from Abdul-Rahman bin Yarbu." Ibn Khuzayma graded it sahih (4/175, hadith no. 2631), as did Hakim (1/450, 451), and Dhahabi agreed. The hadith has corroborating narrations, but they are all daif.