Imam Baqir (a.s) said: “Whoever goes to the toilet in a graveyard or urinates standing up or in water; whoever walks with one shoe; or drinks while standing up, or stays alone in a room, or sleeps with greasy hands will be overcome by Satan, and will not be freed until God wills. These are the easiest ways for Satan to overcome man. God's Prophet (a.s) was approaching a desert occupied by Jinns during one of his battles. When they got there, he told his companions to be careful and hold each other's hands when they wanted to cross through it. He instructed them not to cross it alone. One of his companions crossed it alone and got a headache when he got out. When the Prophet heard about him, he took that man's thumb and said: “O' evil! Leave in the Name of God. I am God's Prophet.” The man immediately got well and stood up.