Al-Bukhārī has also recorded this report in several other places of his work, and Muslim (2) includes it in the Book of Zakāh of his Ṣaḥīḥ through multiple chains leading back to ʿUmārah ibn al-Qaʿqāʿ.

Imām Aḥmad (3) said: “Yahyā related to us, from al-Aʿmash, from ʿAmr ibn Murrah, from Abū al-Bakhtarī, from ʿAlī, who said:
‘The Messenger of Allah ﷺ sent me to Yemen while I was still young. I said, “You are sending me to a people among whom incidents will occur, and I have no knowledge of adjudication.” He replied, ‘Allah will guide your tongue and make your heart steadfast.’ After that I never doubted any judgment between two people.’ (4)”

Ibn Mājah (5) transmitted the same report through the chain of al-Aʿmash.

Imām Aḥmad (6) said: “Aswad ibn ʿĀmir narrated to us; Shurayk narrated to us, from Simāk, from Ḥanish, from ʿAlī, who said:
‘The Messenger of Allah ﷺ sent me to Yemen. I said, “O Messenger of Allah, you are sending me to a people older than I, and I am but a youth (7) with no grasp of judicial matters.” He placed his hand on my chest and said:
‘O Allah, make his tongue firm and guide his heart. O ʿAlī, when two litigants sit before you, do not judge between them until you have heard from the second as you heard from the first; if you do that, the ruling (8) will become clear to you.’
After that, no verdict ever confused me, nor did any case prove difficult for me.’ ”

Aḥmad and Abū Dāwūd likewise reported it through other chains from Shurayk (9), while al-Tirmidhī (10) narrated it through Zāʾidah—both of them from Simāk ibn Ḥarb—from Ḥanish ibn al-Muʿtamir, or—as some say—Ibn Rabīʿah al-Kinānī al-Kūfī, from ʿAlī.

Imām Aḥmad (11) further said: “Sufyān ibn ʿUyaynah narrated to us, from al-Ajlaḥ (12), from al-Shaʿbī, from ʿAbd Allāh ibn Abī …”