What to say when one is angry or harsh for Allah's sake
حَدَّثَنَا يَسَرَةُ بْنُ صَفْوَانَ، حَدَّثَنَا إِبْرَاهِيمُ، عَنِ الزُّهْرِيِّ، عَنِ الْقَاسِمِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ دَخَلَ عَلَىَّ النَّبِيُّ صلى الله عليه وسلم وَفِي الْبَيْتِ قِرَامٌ فِيهِ صُوَرٌ، فَتَلَوَّنَ وَجْهُهُ، ثُمَّ تَنَاوَلَ السِّتْرَ فَهَتَكَهُ، وَقَالَتْ قَالَ النَّبِيُّ صلى الله عليه وسلم " مِنْ أَشَدِّ النَّاسِ عَذَابًا يَوْمَ الْقِيَامَةِ الَّذِينَ يُصَوِّرُونَ هَذِهِ الصُّوَرَ ".
Narrated `Aisha: The Prophet (ﷺ) entered upon me while there was a curtain having pictures (of animals) in the house. His face got red with anger, and then he got hold of the curtain and tore it into pieces. The Prophet (ﷺ) said, "Such people as paint these pictures will receive the severest punishment on the Day of Resurrection ."