Abu Sa'id al-Khudri reported Allah's Messenger ﷺ as saying that Moses asked his Lord to teach him something with which to make mention of Him or to supplicate Him, and was told to say, “There is no Allah but Allah.” He replied to his Lord that all His servants said this, but he wanted something particularly for himself, and He said, “Moses, were the seven heavens and their inhabitants apart from me and the seven earths put in one side of a balance and ‘There is no Allah but Allah’ in the other, ‘There is no Allah but Allah’ would outweigh them.” It is transmitted in Shar as-sunna.