عن ابْنِ عُمَرَ رَضيَ اللهُ عنهُما قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «أَيُّمَا امْرِئٍ قَالَ لِأَخِيهِ: يَا كَافِرُ، فَقَدْ بَاءَ بِهَا أَحَدُهُمَا، إِنْ كَانَ كَمَا قَالَ، وَإِلَّا رَجَعَتْ عَلَيْهِ».
Kutoka kwa bin Omari -radhi za Allah ziwe juu yake yeye na baba yake- amesema: Amesema Mtume -rehema na amani ziwe juu yake-: "Mtu yeyote atakayesema kumwambia ndugu yake: Ewe kafiri, basi utampata mmoja katika ya hao wawili, ikiwa atakuwa kama alivyosema (litathibiti hilo), na kama si hivyo utarejea kwake".
Ibn ‘Umar (may Allah be pleased with him and his father) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) said: "Any person who says to his brother: O disbeliever, it will, indeed, fall upon one of them; if he is as he said, or else it will return to him."
Amekemewa muislamu kusema kumwambia ndugu yake muislamu mambo asiyokuwa nayo, kama sifa ya uovu na ukafiri.
Tahadhari ya kusema maneno haya machafu, na kwamba msemaji wake yuko katika hatari kubwa atakaposema kumwambia ndugu yake, na lazima kuhifadhi ulimi, na muislamu asizungumze ila kwa elimu.