R. Yossi Haglili says: (Ibid.) "And it was spread around the camp about a day's journey on one side and a day's journey on the other side" for a distance of three parasangs on every side, "and about two cubits deep on the ground", and (Psalms 78:28) "and He made them (the quail) fall in the midst of their camp around their dwellings."
Rabbi Yosei Estimated the Coverage at Three Parasangs in Every
Mekhilta Tractate Vayassa 4:5