The Book of Oaths, Muharibin, Qasas (Retaliation), and Diyat (Blood Money)
Ṣaḥīḥ Muslim 4377
لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنِّي رَسُولُ اللَّهِ إِلاَّ ثَلاَثَةُ نَفَرٍ التَّارِكُ الإِسْلاَمَ الْمُفَارِقُ لِلْجَمَاعَةِ أَوِ الْجَمَاعَةَ - شَكَّ فِيهِ أَحْمَدُ - وَالثَّيِّبُ الزَّانِي وَالنَّفْسُ بِالنَّفْسِ
lā ilaha illā-Llāh wa-annī rasūlu-Llāh illā thalāthah nafarin at-tāriku al-islāma al-mufāriqu liljamāʿah awi al-jamāʿaha-shakka fīhi aḥmadu-wa-ath-thayyibu az-zānī wa-an-nafsu bi-an-nafsi
Transliteration generated from the Arabic vowel marks
The full narration
Abdullah (b. Mas'ud) reported:Allah's Messenger (ﷺ) stood up and said: By Him besides Whom there is no god but He, the blood of a Muslim who bears the testimony that there is no god but Allah, and I am His Messenger, may be lawfully shed only in case of three persons: the one who abandons Islam, and deserts the community [Ahmad, one of the narrators, is doubtful whether the Prophet (ﷺ) used the word li'l-jama'ah or al-jama'ah), and the married adulterer, and life for life
Source
Ṣaḥīḥ Muslim · 4377
- Agreed upon as authentic (al-Bukhārī / Muslim)