Sahih Bukhari

Narrated Kharija bin Zaid:Zaid bin Thabit said, ""When the Qur'an was compiled from various written manuscripts, one of the Verses of Surat Al-Ahzab was missing which I used to hear Allah's Messenger (ﷺ) reciting. I could not find it except with Khuza`ima bin Thabit Al-Ansari, whose witness Allah's Messenger (ﷺ) regarded as equal to the witness of two men. And the Verse was:-- ""Among the believers are men who have been true to what they covenanted with Allah.""