From Sahih Bukhari (Hadith 3965):
Narrated Abu Mijlaz:From Qais bin Ubad: `Ali bin Abi Talib said, "I shall be the first man to kneel down before (Allah), the Beneficent to receive His judgment on the day of Resurrection (in my favor)." Qais bin Ubad also said, "The following Verse was revealed in their connection:-- "These two opponents believers and disbelievers) Dispute with each other About their Lord." (22.19) Qais said that they were those who fought on the day of Badr, namely, Hamza, `Ali, 'Ubaida or Abu 'Ubaida bin Al-Harith, Shaiba bin Rabi`a, `Utba and Al-Walid bin `Utba
Reference: Bukhari 3965