Exodus 17:1-7(Darby)
1 And all the assembly of the children of Israel journeyed from the wilderness of Sin, according to their journeys, at the command of Jehovah; and they encamped in Rephidim; and there was no water for the people to drink.
2 And the people contended with Moses, and said, Give us water, that we may drink! And Moses said to them, Why do ye dispute with me? Why do ye tempt Jehovah?
3 And the people thirsted there for water; and the people murmured against Moses, and said, Why is it that thou hast brought us up out of Egypt, to kill us and our children and our cattle with thirst?
4 And Moses cried to Jehovah, saying, What shall I do with this people? Yet a little, and they will stone me!
5 And Jehovah said to Moses, Go on before the people, and take with thee of the elders of Israel, and thy staff with which thou didst smite the river, take in thy hand, and go.
6 Behold, I will stand before thee there upon the rock on Horeb; and thou shalt strike the rock, and there shall come water out of it, that the people may drink. And Moses did so before the eyes of the elders of Israel.
7 And he called the name of the place Massah, and Meribah, because of the contention of the children of Israel, and because they had tempted Jehovah, saying, Is Jehovah among us, or not?
generation!

A rock is a material consisting of the aggregate of minerals like those making up the Earth’s crust. How then can rock travel?
The Israelites journeyed from the wilderness of Sin to Rephidim, where they murmured for lack of water and Moses sought help from God, who commands him to and smite the rock with his rod to produce water for the people to drink.
Interestingly, it was in the wilderness of “sin” that the children of Israel murmured and demanded water, Moses’ response was why chide ye with me? —God is your leader, complain to God; (indeed, why do we complain to man instead of God?).
Why do we tempt the Lord with our complaints? As God is our leader, all our murmurings against any leader, as Moses said, is considered directed against God.
Has God not given us sufficient proof that He can destroy His enemies and support His friends, as we showed the Israelites? And is God not among us to do us good?
This question is as relevant to us today as it was to the Israelis then. We keep turning from God — repeating the same offence of murmur and complaints according to Psalm 78:41.
I will stand before you there, upon the rock in Horeb—The rock. God directed Moses’ attention to a particular rock, a rock he was acquainted with; for every part of the mountain and its vicinity must have been well known to Moses during the time he kept Jethro’s flocks.
1 Samuel 2:2 say there is no Rock like our God, the Lord who is the Rock is the God who supplied the water in the rock as Moses struck it, the rock where no water had been before nor has been since. The water supply was abundant enough to quench the thirst of two million people.
Moses called the name of the place Massah, and Meribah, signifies the temptation or trial; Meribah means contention or litigation.
From 1 Corinthians 10:4, we learn that this rock was a type of Christ, and their drinking of it represents them as partakers of the grace and mercy of God through Christ Jesus; and yet many of them that drank fell and perished in the wilderness in the very act of disobedience!
If the miracle of the gushing water happened in two different locations, at the waters of Meribah in Numbers 20, did it come from the same rock? For one, the waters of Meribah were mentioned in both locations, in Exodus 17:7 and Numbers 20:23. So, it looks like the rock moved with the children as they moved, going up with them to the mountains and going down with them into the valley.
Paul mentioned the travelling rock from which the Israelis drank from, the spiritual rock that accompanied them, and that rock was Christ according to 1 Corinthians 10:4, if God did provide for the children of Israel throughout their wilderness experience, without running out of water or food, He can still and will continue to provide for you, no matter what.
Christ is the travelling Rock of water, the water that won’t run dry, drink as much as you desire.
Shalom