5. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from Muhammad ibn Ali from Muhammad ibn Sinan from Hamzah ibn Humran who has said the following: “Once, a man complained before abu Ja‘far , saying, ‘Jinn has expelled us from our homes.’ He (the Imam) said, ‘Keep the height of the roof of your houses seven yards (arm-length).’ The man has said, ‘We followed the instruction and thereafter we did not see anything that we dislike.’”