(a) A similar narration is reported from Sayyiduna Zayd (may Allah be pleased with him) through another chain.
(b) Ibn Shihab (may Allah have mercy on him) added: Kharijah bin Zayd (may Allah have mercy on him) narrated to me from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that Sayyiduna Zayd (may Allah be pleased with him) said: "I could not find that verse of Surah al-Ahzab which I had heard from the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) used to recite it. So I searched for it, and I found it only with Sayyiduna Khuzaymah al-Ansari (may Allah be pleased with him), whose testimony the Messenger of Allah (peace and blessings be upon him) had made equal to the testimony of two men." That is, the statement of Allah Almighty: "Among the believers are men who have been true to what they pledged to Allah" [Surah al-Ahzab: 23].
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2373