عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا مِنْ حَدِيثٍ طَوِيلٍ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ ((مَا مِنْ جَرْعَةٍ أَحَبَّ إِلَيَّ مِنْ جَرْعَةِ غَيْظٍ يَكْظِمُهَا عَبْدٌ مَا كَظَمَهَا عَبْدٌ لِلَّهِ إِلَّا مَلَأَ اللَّهُ جَوْفَهُ إِيمَانًا))
It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: There is no gulp more beloved to Allah Almighty than the gulp of anger which a servant swallows. When a servant swallows such a gulp for the sake of Allah Almighty, Allah fills his heart with faith.