It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: On the night of Isra, when we reached the seventh heaven, I looked upwards and saw thunder, lightning, flashes, and thunderous lightning. Then I came to some people whose bellies were as large as houses, and inside them were snakes that could be seen from outside their bellies. I said: O Jibreel! Who are these people? He said: These are the usurers. Then when I descended towards the lowest heaven, I saw that below me there was dust, smoke, and noises. I said: O Jibreel! What is this? He said: These are the devils who hover in front of the eyes of the children of Adam so that they cannot reflect on the kingdoms of the heavens and the earth. If it were not for them, they would see wondrous things.