Beholdest thou not that Allah driveth a cloud along , then combineth it , then maketh it a heap , and then thou beholdest the fine rain come forth from the interstices thereof ? And He sendeth down from the heaven mountains wherein is hail , then afflicteth therewith whomsoever He will , and averteth it from whomsoever He will : wellnigh the flash of His lightening taketh away the sights .