(458) بَابُ مُنْتَهَى السَّلامِ
(sic) Abu'z-Zinad said, "Kharija (ibn Zayd ibn Thabit) used towrite on the letter of Zayd when he said the salam, 'Peace be upon you,Amir al-Mu'minin, and the mercy of Allah and His blessings and His forgivenessand the best of His prayers." (ID)
Reference (ID): Al-Adab Al-Mufrad 1001b (ID)
In-book reference (ID): Book 42, Hadith 38 (ID)
English translation (ID): Book 42, Hadith 1001 (ID)