Every event that undermines faith must be washed with water, which is the renewal of faith in knowledge. If he is one of the people who consider rational evidence, then he believes based on rational evidence. He is like one who has water and is able to use it, even if he is not one of the people of reasoning. In the evidence, he was an imitator who was obligated to be pure by faith, from that event that removed his faith by the sword or due to good suspicion, so he is one who performs dry ablution with dust when he loses water or is unable to use water.