Al-Lu'lu Wal-Marjan 1091 — The Book of Al-Qasama [The oath taken by fifty men (of the defendant) regarding a murder case when no evidence is available]

'Abdullah bin Mas'ud Narrated from:

Allâh's Messenger ﷺ said, "The blood of a Muslim who confesses that Lâ ilâha ill-Allâh (none has the right to be worshipped but Allâh) and that I am the Messenger of Allâh cannot be shed except in three cases: (1) life for life (in cases of intentional murders without right (i.e. Qisâs — law of equality in punishments); (2) a married person who commits illegal sexual intercourse and (3) the one who turns renegade from Islâm (apostate) and leaves the group of Muslims (by innovating heresy, new ideas and new things etc. in the Islâmic religion). (See Fath Al-Bârî, Vol. 15, P. 220 for details) ( Sahîh Al-Bukhârî, Hadîth No. 17, Vol. 9)