An encampment of the Israelites between the wilderness of Sin and mount Sinai, where the people murmured, and God gave them water from the rock. Here also the Amalekites attacked them, and were defeated, Exodus 17:1-16. It is thought to have been in the valley now called esh-Sheikh, a day’s march northwest of Sinai, and near the western border of the Horeb group of mountains. SEE SINAI.
These dictionary topics are from American Tract Society Bible Dictionary published in 1859. Public Domain, copy freely.
Rand, W. W. "Entry for 'REPHIDIM'". "American Tract Society Bible Dictionary".