حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ قَالَ سَمِعْتُ لَيْثًا سَمِعْتُ طَاوُسًا يُحَدِّثُ عَنِ ابْنِ عَبَّاسٍ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ قَالَ عَلِّمُوا وَيَسِّرُوا وَلَا تُعَسِّرُوا وَإِذَا غَضِبَ أَحَدُكُمْ فَلْيَسْكُتْ
مسند امام احمد بن حنبل · Hadith 2136
It was narrated from Ibn 'Abbas (RA) that the Prophet (PBUH)said: "Teach and make things easy; do not make things difficult. If one of you gets angry, let him keep quiet."
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020