“What are these people doing?”
They replied, “They are lifting a stone to demonstrate their strength.” The Prophet said, “Shall I not direct you to something stronger than that?”—or words to that effect—“It is the one who controls himself when angry.”
He then cited the first report with the wording:
The Prophet passed by some people wrestling and said, “What is this?”
They said, “O Messenger of Allah, this is so-and-so, the wrestling champion: no one wrestles him without being thrown by him.” The Messenger of Allah then said the same.
Al-Haythami said in Majmaʿ al-Zawāʾid (8/68):
“Both were narrated by al-Bazzar through a single chain of transmission. It includes Shuʿayb ibn Bayan and ʿImran al-Qaṭṭan. Ibn Hibban declared them both trustworthy, while others deemed them weak; the remaining narrators in both chains are narrators of the authentic collections.”
I say: The chain is good, and al-Hafiz said likewise in al-Fath (10/519).
It is further supported by the hadith of Abu Hurayrah, attributed to the Prophet, with the wording:
“The strong man is not the wrestler; rather, the strong man is the one who controls himself when angry.”
Al-Bukhari, Muslim, and others recorded it. Ibn Hibban’s wording is:
“The strong man is not the one who overcomes people; rather, the strong man is the one who overcomes himself.”
It has been fully sourced in the commentary on Sahih al-Adab al-Mufrad (500/989). *