Rephidim in Smiths Bible Dictionary

Ex 17:1,8; 19:2 The name means rests or stays, i.e. resting places. The place lies in the march of the Israelites from Egypt to Sinai. Its site is not certain, but it is perhaps Wady Feiran, a rather broad valley about 25 miles from Jebel Musa (Mount Sinai). Others place it in Wady es Sheikh, an eastern continuation of Feiran, and about 12 miles from Sinai. Here the Israelites fought their first battle and gained their first victory after leaving Egypt, the Amalekites having attacked them; here also the people murmured from thirst, and Moses brought water for them out of the rock. From this murmuring the place was called "Massah" and "Meribah."