عَنْ أَبِي ذَرٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ لَنَا إِذَا غَضِبَ أَحَدُكُمْ وَهُوَ قَائِمٌ فَلْيَجْلِسْ فَإِنْ ذَهَبَ عَنْهُ الْغَضَبُ وَإِلَّا فَلْيَضْطَجِعْ
Sayyiduna Abu Dharr (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) instructed us: When any one of you becomes angry while standing, he should sit down. If the anger leaves him, then fine; otherwise, he should lie down.