Exodus 17:1

Overview - Exodus 17
1	The people murmur for water at Rephidim.
6	God sends them for water to the rock in Horeb.
7	The place is called Massah and Meribah.
8	Amalek is overcome by Joshua, while Moses holds up his hands with the rod of God.
14	Amalek is doomed to destruction; and Moses builds the altar JEHOVAH-nissi.

Exodus 17:1  (King James Version)
And all the congregation of the children of Israel journeyed from the wilderness of Sin, after their journeys, according to the commandment of the LORD, and pitched in Rephidim: and there was no water for the people to drink.