It is narrated from Sayyiduna Zaid bin Thabit (may Allah be pleased with him), he says: When the manuscripts of the Qur'an were being written, I could not find one verse, although I used to hear it from the Noble Prophet (peace and blessings be upon him). Eventually, I found that verse with Sayyiduna Khuzaymah Ansari (may Allah be pleased with him). That verse was: {مِنْ الْمُؤْمِنِینَ رِجَالٌ صَدَقُوْا مَا عَاہَدُوا اللّٰہَ عَلَیْہِ … تَبْدِیلًا}. Sayyiduna Khuzaymah (may Allah be pleased with him) was called "the one with two testimonies" because the Noble Prophet (peace and blessings be upon him) considered his testimony equal to that of two men. Imam Zuhri (may Allah have mercy on him) says: Sayyiduna Khuzaymah (may Allah be pleased with him) was martyred in the Battle of Siffin, while he was fighting on the side of Sayyiduna Ali (may Allah be pleased with him).

(Second chain) It is narrated from Sayyiduna Zaid bin Thabit (may Allah be pleased with him), he says: When we were writing the Mushaf, I could not find one verse of Surah Al-Ahzab, although I had heard it from the Noble Prophet (peace and blessings be upon him). That verse was: {رِجَالٌ صَدَقُوْا مَا عَاہَدُوا اللّٰہَ عَلَیْہِ … … }. When I searched for that verse, I found it with Sayyiduna Khuzaymah bin Thabit (may Allah be pleased with him), so I wrote it in its surah in the Mushaf.