Sayyidina Ibn Abbas (RA) reported that some Jews came to the Prophet (SAW) and said, “O Abul Qasim!Tell us about al-Ra’d (The Thunder) what is it?” He said, “He is an angle among angels appointed over the clouds. He holds a whip of fire with which he drives the clouds to whatever Allah wills.” They asked, “What is this sound that we hear?” He said, “This is his urging the clouds when he drives them till they end up where they are commanded to go.” They said “You speak the truth.” And they asked, “What had Isra’il forbidden himself?” He said, “He complained of sciatica and he did not find anything comforting him except the flesh of camel and camel milk. So, hed forbid himself these things.” They said, “You speak the truth.”