(Exodus 15:27) "And they came to Eilim, and there (they found) twelve springs of water.": We are hereby apprised that it was (specially) favored above all other places. Know this to be so, for there were twelve springs there, which sufficed for (only) seventy palm trees; but when Israel came and sixty ten thousands encamped there, it sufficed for them (for one day) and twice and thrice over.
When Israel Arrived, Six Hundred Thousand People Encamped There
Mekhilta Tractate Vayassa 2:1