Approach not prayers with a mind befogged , until ye can understand all that ye say , - nor in a state of ceremonial impurity ( Except when travelling on the road ) , until after washing your whole body . If ye are ill , or on a journey , or one of you cometh from offices of nature , or ye have been in contact with women , and ye find no water , then take for yourselves clean sand or earth , and rub therewith your faces and hands .