8. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from Ali ibn abu Hamza from abu al-Hassan عليه السلام who has said the following: “During certain expeditions people complained before the Messenger of Allah against fleas that irritated them. He (the Messenger of Allah) said, ‘When going into your bed say, “O black jumping thing that does not stop by the barrier or door I ask you by the original Book, do not irritate me and my companions until the night passes and morning comes with whatever it will bring along.’” The narrator has said, ‘As we know the last part of this Hadith has the following expression: ‘Until morning comes back when it is the time to come back.’”