
562 The reference is either to a state of intoxication or to a dazed state of mind on account of drowsiness or some other cause; or perhaps both are implied. Before the prohibition of intoxicants altogether was promulgated, it was at least unbecoming that people should come to prayers in such a state. For prayers it is only right that we should collect our whole minds and approach Allah in a spirit of reverence. "Prayers" (Salah) here may mean "a place of prayers," a Mosque: the resulting meaning would be the same.
563 The strictest cleanliness and purity of mind and body are required, especially at the time of prayer. But there are circumstances when water for ablutions is not easily obtainable, especially in the dry conditions of Arabia , and then washing with dry sand or clean earth is recommended. Four such circumstances are mentioned: the two last when washing is specially required; the two first when washing may be necessary, but it may not be easy to get water. For a man, when he is ill, cannot walk out far to get water, and a man on ajourney has no full control over his supplies. In all four cases, where water cannot be got, cleaning with dry sand or dry earth is recommended. This is called Tayammum, (Cf. 4:159 and 5:6).

16 Intoxicants were prohibited in the Quran in three stages: 2:219, 4:43, and finally 5:90-91.