حَدَّثَنَا مُحَمَّدٌ، وَأَحْمَدُ بْنُ سَعِيدٍ، قَالاَ حَدَّثَنَا عُثْمَانُ بْنُ عُمَرَ، أَخْبَرَنَا عَلِيُّ بْنُ الْمُبَارَكِ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا قَالَ الرَّجُلُ لأَخِيهِ يَا كَافِرُ فَقَدْ بَاءَ بِهِ أَحَدُهُمَا ‏"‏‏.‏ وَقَالَ عِكْرِمَةُ بْنُ عَمَّارٍ عَنْ يَحْيَى، عَنْ عَبْدِ اللَّهِ بْنِ يَزِيدَ، سَمِعَ أَبَا سَلَمَةَ، سَمِعَ أَبَا هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم‏.‏

Narrated Thabit bin Ad-Dahhak

The Prophet (ﷺ) said, "Whoever swears by a religion other than Islam (i.e. if he swears by saying that he is a non-Muslim in case he is telling a lie), then he is as he says if his oath is false and whoever commits suicide with something, will be punished with the same thing in the (Hell) fire, and cursing a believer is like murdering him, and whoever accuses a believer of disbelief, then it is as if he had killed him."