John Gill Commentary Numbers 33:9

"And they journeyed from Marah, and came unto Elim: and in Elim were twelve springs of water, and threescore and ten palm-trees; and they encamped there." — Numbers 33:9 (ASV)

And they removed from Marah, and came unto Elim
Which was eight miles from Marah:

and in Elim were twelve fountains of water, and three score and ten
palm trees, and they pitched there ;
being a convenient place of water for them,