Exodus 15:23-24

Marah : an encampment site where Moses made bitter water sweet
(29° 21´, 32° 56´)

Moses : a son of Amram; the Levite who led Israel out of Egypt and gave them The Law of Moses,a Levite who led Israel out of Egypt and gave them the law

Exodus 17:1-4

Egypt : descendants of Mizraim
(30° 6´, 31° 20´); (30° 6´, 31° 20´)

Israel : a citizen of Israel.,a member of the nation of Israel

Moses : a son of Amram; the Levite who led Israel out of Egypt and gave them The Law of Moses,a Levite who led Israel out of Egypt and gave them the law

Rephidim : an encampment where water came out of a rock for Israel
(28° 43´, 33° 50´)

Sin : a wilderness region between Elim and Mt. Sinai (IBD)
(28° 50´, 33° 25´); (28° 50´, 33° 25´); (30° 41´, 34° 29´); (30° 41´, 34° 29´)