What is the significance of the seven times that the Torah mentions "Anan" in connection with Yisrael's travels in the desert?
Rashi: This teaches that there were seven clouds - four on the four sides, one above, one below, and one in front to flatten the mountains, to fill in the craters and to kill the snakes and the scorpions.
What does the Torah mean when it writes "b'Nas'am min ha'Machaneh"?
Rashi: It means 'when they departed from the location where they encamped'.
Rashi writes that it says "Anan" seven times to teach that there were seven Clouds. It is written 14 times (from 9:15, until this verse)!
Moshav Zekenim: There were seven when they traveled, and seven when they camped. Rashi taught only about the former.