Mukhtasar Muslim (Abridged) 1599 — Following the Prophet and Allah's

`Sayyiduna Sa’d bin Abi Waqqas (may Allah be pleased with him) reports that` the Messenger of Allah (peace and blessings be upon him) said: The greatest sin among the Muslims is that of the Muslim who asked about something which was not forbidden to the Muslims, but due to his questioning, it became forbidden.