O true believer , come not to prayer when ye are drunk, until ye understand what ye say; nor when ye are polluted by emission of seed, unless ye be travelling on the road, until ye wash yourselves. But if ye be sick, or on a journey, or any of you come from easing nature, or have touched women, and find no water; take fine clean sand and rub your faces and your hands therewith; for God is merciful and inclined to forgive.