Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ahmad:22015ʿAbd al-Razzāq > Maʿmar > Ayyūb > Ḥumayd b. Hilāl al-ʿAdawī > Abū Burdah

[Machine] A man who was Jewish embraced Islam, then turned back to Judaism. We wanted him to remain upon Islam since he had said two months ago, "By Allah, I will not sit until you strike his neck." So his neck was struck and he said, "Allah and His Messenger have determined that whoever reverts from his religion, kill him, or whoever changes his religion, kill him."  

أحمد:٢٢٠١٥حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا مَعْمَرٌ عَنْ أَيُّوبَ عَنْ حُمَيْدِ بْنِ هِلَالٍ الْعَدَوِيِّ عَنْ أَبِي بُرْدَةَ قَالَ قَدِمَ عَلَى أَبِي مُوسَى مُعَاذُ بْنُ جَبَلٍ بِالْيَمَنِ فَإِذَا رَجُلٌ عِنْدَهُقَالَ مَا هَذَا؟ قَالَ

رَجُلٌ كَانَ يَهُودِيًّا فَأَسْلَمَ ثُمَّ تَهَوَّدَ وَنَحْنُ نُرِيدُهُ عَلَى الْإِسْلَامِ مُنْذُ قَالَ أَحْسَبُهُ شَهْرَيْنِ فَقَالَ وَاللهِ لَا أَقْعُدُ حَتَّى تَضْرِبُوا عُنُقَهُ فَضُرِبَتْ عُنُقُهُ فَقَالَ قَضَى اللهُ وَرَسُولُهُ أَنَّ مَنْ رَجَعَ عَنْ دَيْنِهِ فَاقْتُلُوهُ أَوْ قَالَ مَنْ بَدَّلَ دَيْنَهُ فَاقْتُلُوهُ