He was watering his livestock at a trough of his when a group of people came along. He said, "Which of you will bring his animals to drink at Abu Dharr's trough and earn the reward of plucking hairs from his head?"A man said, "I will."The man came and brought his animals to the trough, breaking it. Abu Dharr had been standing, so he sat down, then he lay down on his side.He was asked, "Abu Dharr, why did you sit down and then lie down?"He replied, "The Messenger of Allah ﷺ told us, 'When one of you becomes angry while standing, let him sit down. If the anger leaves him, well and good. Otherwise, let him lie down.'"
كان يسقي على حوض له فجاء قوم فقال: أيكم يورد على أبي ذر ويحتسب شعرات من رأسه؟ فقال رجل: أنا، فجاء الرجل فأورد عليه الحوض فدقه، وكان أبو ذر قائما فجلس، ثم اضطجع، فقيل له: يا أبا ذر لم جلست ثم اضطجعت؟ قال: فقال إن رسول الله ﷺ قال لنا: إذا غضب أحدكم وهو قائم فليجلس، فإن ذهب عنه الغضب، وإلا فليضطجع.
Ahmad narrated it (21348) from Abu Muawiya, who said, "Dawud bin Abu Hind narrated to us, from Abu Harb bin Abu Aswad, from Abu Aswad, from Abu Dharr," and he related it. Its isnad is sahih.Abu Dawud narrated it (4782) from Ahmad bin Muhammad bin Hanbal, from Abu Muawiya, with the same wording, but he did not mention "Abu Aswad" between Abu Harb and Abu Dharr. Perhaps it was transmitted this way (disconnected) in his copy, and on that basis he judged it defective.He also narrated it (4783) from Wahb bin Baqiya, from Khalid, from Dawud, from Bakr (that is, Ibn Abdullah Muzani), that the Prophet ﷺ sent this hadith, and he said, "This is the more sahih of the two hadiths."Mizzi mentioned after it in Tuhfat Ashraf (1939), "Abu Harb only narrates from his uncle, from Abu Dharr, and no hearing from Abu Dharr himself is known to be preserved for him."Daraqutni mentioned in al-Ilal (1135) the disagreement concerning this hadith, and he preferred the mursal version of Abu Harb bin Aswad, from Abu Dharr, meaning the disconnected isnad from Abu Dharr, over the connected one he mentioned from Abbas bin Yazid, from Abu Muawiya. Abbas bin Yazid used to make mistakes, and he did not mention Ahmad's connected isnad.