When he was there, the youth came and asked his permission, saying, Messenger of Allah. Give me permission to return to my family. The Messenger of Allah, may Allah bless him and grant him peace, gave him permission and said, Take your weapons with you, for I fear the Banu Quraydha tribe. They may harm you. The youth went to his family and found his wife standing between the two doors. He lifted his spear to stab her as jealousy had been aroused in him. She said, Don't be hasty until you go in and see what is in your house. He entered and found a snake coiled up on his bed. He transfixed it with his spear and then went out with it and pitched it into the house. The snake stirred on the end of the spear and the youth fell dead. No one knew which of them died first, the snake or the youth. That was mentioned to the Messenger of Allah, may Allah bless him and grant him peace, and he said, There are jinn in Madina who have become muslim. When you see one of them, call out to it for three days. If it appears after that, then kill it, for it is a shaytan. '

Malik related to me from a reliable source of his from Yaqub ibn Abdullah al-Ashajj from Bushr ibn Said from Sad ibn Abi Waqqas from Khawla bint Hakim that the Messenger of Allah, may Allah bless him and grant him peace, said, Whoever dismounts to rest in a place should say, 'I seek refuge with the complete words of Allah from the evil of what he created,' (audhu bi kalimati-llahi at-tammati min sharri ma khalaqa), and nothing will harm him until he remounts.