Swearing to the Truthfulness of the Qur'an and the Failure of Those Who oppose it

Ibn `Abbas said, "Ar-raj` means rain." It has also been narrated from him that he said, "It means the clouds that contain rain." He also said,

وَالسَّمَآءِ ذَاتِ الرَّجْعِ

وَالسَّمَاءِ ذَاتِ الرَّجْعِ (I swear by the sky that rains...86:11) The word raj refers to 'the rain that comes down repeatedly'. In other words, the rain that comes down and stops and then returns.