Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: I heard Sayyiduna Umar saying from this pulpit: O people! When the command regarding the prohibition of alcohol was revealed, it was being made from five things: grapes, honey, wheat, and barley. Whatever covers the intellect is khamr (intoxicant). There are three things regarding which I wished that the Prophet (peace and blessings of Allah be upon him) had explained to us more clearly: (in inheritance) the issue of the grandfather, the issue of kalalah, and some forms of usury.