وَعَنِ ابْنِ عَبَّاسٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَا تُمَارِ أَخَاكَ وَلَا تُمَازِحْهُ وَلَا تَعِدْهُ مَوْعِدًا فَتُخْلِفَهُ» . رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حديثٌ غَرِيب وَهَذَا الْبَابُ خَالٍ عَنِ الْفَصْلِ الثَّالِثِ
Ibn Abbas (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him), he (peace and blessings be upon him) said: "Do not quarrel with your (Muslim) brother, nor joke with him in a hurtful manner, nor make a promise to him which you will break." __REF_N__ Tirmidhi, and he said: This hadith is gharib. Its chain is weak. Narrated by Tirmidhi.