Ali said, "I am the first to kneel before the Most Merciful for judgment in a dispute on the Day of Resurrection."Qays bin Abbad said, "It was concerning them that this verse was revealed, 'These are two opposing parties who disputed concerning their Lord' [Hajj 22:19]." He explained that they were the men who fought in single combat at Badr, Hamza, Ali, and Ubayda, or Abu Ubayda bin Harith, against Shayba bin Rabia, Utba, and Walid bin Utba.In another narration, Ali said, "This verse was revealed concerning us, 'These are two opposing parties' [Hajj 22:19]."
أنا أول من يجثو بين يدي الرحمن للخصومة يوم القيامة. وقال قيس بن عباد: وفيهم أنزلت: {هذان خصمان اختصموا في ربهم} قال: هم الذين تبارزوا يوم بدر: حمزة، وعلي، وعبيدة، أو أبو عبيدة بن الحارث، وشيبة بن ربيعة، وعتبة، والوليد بن عتبة. وفي رواية: قال علي: فينا نزلت هذه الآية: {هذان خصمان}
Bukhari narrated it in Maghazi (3965) from Muhammad bin Abdullah Raqashi, who said, Mutamir (that is, Ibn Sulayman) narrated to us, he said, I heard my father (that is, Sulayman Taymi) say, Abu Majliz (that is, Lahiq bin Humayd) narrated to us from Qays bin Abbad, from Ali bin Abu Talib, and he related it. The second narration was reported by Bukhari (3967) through Yusuf bin Yaqub, from Sulayman Taymi, with the same wording.His saying, "yajthu," with a jim and a threefold letter (tha), means he kneels down on his knees in confrontation, and what is meant by this being "first" is that it is restricted to the fighters of this ummah, since the duel mentioned was the first duel to take place in Islam. And His saying, "Scalding water will be poured over their heads, by which what is in their bellies and their skins will be melted." [Hajj 22:19–20]