Abu Hurairah said: “Once when the Prophet of Allah was sitting with his Companions, a cloud came above them, so the Prophet of Allah said: ‘Do you know what this is?’ They said: ‘Allah and His Messenger know better.’ He said: ‘These are the clouds that are to drench the earth, which Allah down with a rope to the lowest earth, then he would descend upon Allah.’ Then he recited: He is Al-Awwal, Al-Akhir, Az-Zahir Al-Batin, and He has knowledge over all things.”
Jami` at-Tirmidhi Book 47, Hadith 350