It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that I went with the Prophet (peace and blessings be upon him) to a woman, and she slaughtered a goat for us. The Messenger of Allah (peace and blessings be upon him) said: "A man who is from the people of Paradise will now enter," and Sayyiduna Abu Bakr (may Allah be pleased with him) entered. Then he (peace and blessings be upon him) said: "A man who is from the people of Paradise will now enter," and Sayyiduna Umar (may Allah be pleased with him) entered. Then he (peace and blessings be upon him) said: "A man who is from the people of Paradise will now enter. O Allah! If You will, make him Ali." The narrator says: After that Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) entered. This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Salman al-Farisi (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The first of you to reach me at the Pond of Kawthar will be the one who was the first of you to accept Islam, and that is Ali bin Abi Talib."

It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him) that the first to accept Islam with the Messenger of Allah (peace and blessings be upon him) was Ali bin Abi Talib (may Allah be pleased with him). This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it. The reality of the disagreement on this matter is that Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) was the first among adult men to accept Islam, while Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) accepted Islam before reaching adulthood.

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) came to the house of Sayyidah Fatimah (may Allah be pleased with her) and said: "I, you, this sleeping one (that is, Ali) and these two (that is, Hasan and Husayn) will be in one place on the Day of Resurrection." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.