The Forty Hadith of Imam Nawawi #16
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللهُ عَنْهُ أَنَّ رَجُلًا قَالَ لِلنَّبِيِّ صلى الله عليه و سلم أَوْصِنِي. قَالَ: لَا تَغْضَبْ، فَرَدَّدَ مِرَارًا، قَالَ: لَا تَغْضَبْ" . .
On the authority of Abu Hurayrah (may Allah be pleased with him):
A man said to the Prophet (peace and blessings of Allah be upon him), “Counsel me,” so he (peace and blessings of Allah be upon him) said, “Do not become angry.” The man repeated he (peace and blessings of Allah be upon him) said, “Do not become angry.”
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللهُ عَنْهُ أَنَّ رَجُلًا قَالَ لِلنَّبِيِّ صلى الله عليه و سلم أَوْصِنِي. قَالَ: لَا تَغْضَبْ، فَرَدَّدَ مِرَارًا، قَالَ: لَا تَغْضَبْ" . .
A man said to the Prophet (peace and blessings of Allah be upon him), “Counsel me,” so he (peace and blessings of Allah be upon him) said, “Do not become angry.” The man repeated he (peace and blessings of Allah be upon him) said, “Do not become angry.”
— The Forty Hadith of Imam Nawawi, Hadith 16