Translation of the verse 11 from Surah AT-Tariq : Number of verses 17 - - page 591 - Part 30.
By the sky (having rain clouds) which gives rain, again and again.
By the sky which returns [rain]
(86:11) By the heaven with its recurring cycle of rain, *6
*6) The words dhat ar-raj`e have been used for the sky. Literally raj`e means to return, but metaphorically this word is used for the rain in Arabic, for rain does not fall just once, but returns over and over again in the season and of season as well. Another reason for calling the rain raj `e is that vapour from the oceans of the earth and then falls back as rain on the sometimes out water rises as the same earth.