Q 1: In which Surah (Qur'anic chapter) is the order of purifying oneself of Janabah (major ritual impurity related to sexual discharge) mentioned?
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order of purifying oneself of Janabah is stated in Allah's saying:
If you are in a state of Janâba (i.e. after a sexual discharge), purify yourselves (bathe your whole body).
It can be found in Ayah (Qur'anic verse) no. 43 from Surah Al-Nisa' and Ayah no. 6 from Surah Al-Ma'idah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.