Hadith 31-41

وَبِهذَا الإِسنادِ قالَ: قالَ رَسُولُ اللَّهِ‏ صَلَّى اللهُ عَلَيْهِ وَآلِهِ: عَلَيْكُمْ بِحُسنِ الْخُلْقِ فَإِنَّ حُسنَ الخُلقِ الجَنَّةِ لا مَحالَةَ، وَإيّاكُم وَسُوءِ الْخُلْقِ، فَإِنَّ سُوءَ الْخُلْقِ فِي النَّارِ لا مَحالَةَ.

According to the same documentation, God’s Prophet (S) said, “I advise you to be good-tempered as undoubtedly a good-tempered person will go to Paradise. I admonish you against being bad-tempered, since a bad-tempered person will undoubtedly go to Hell.”