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Exodus 17

1
All the congregation of the children of Israel traveled from the wilderness of Sin, starting according to the LORD’s commandment, and encamped in Rephidim; but there was no water for the people to drink.
2
Therefore the people quarreled with Moses, and said, “Give us water to drink.” Moses said to them, “Why do you quarrel with me? Why do you test the LORD?”
3
The people were thirsty for water there; so the people murmured against Moses, and said, “Why have you brought us up out of Egypt, to kill us, our children, and our livestock with thirst?”
4
Moses cried to the LORD, saying, “What shall I do with these people? They are almost ready to stone me.”
5
The LORD said to Moses, “Walk on before the people, and take the elders of Israel with you, and take the rod in your hand with which you struck the Nile, and go.
6
Behold, I will stand before you there on the rock in Horeb. You shall strike the rock, and water will come out of it, that the people may drink.” Moses did so in the sight of the elders of Israel.
7
He called the name of the place Massah, and Meribah, because the children of Israel quarreled, and because they tested the LORD, saying, “Is the LORD among us, or not?”
8
Then Amalek came and fought with Israel in Rephidim.
9
Moses said to Joshua, “Choose men for us, and go out to fight with Amalek. Tomorrow I will stand on the top of the hill with God’s rod in my hand.”
10
So Joshua did as Moses had told him, and fought with Amalek; and Moses, Aaron, and Hur went up to the top of the hill.
11
When Moses held up his hand, Israel prevailed. When he let down his hand, Amalek prevailed.
12
But Moses’ hands were heavy; so they took a stone, and put it under him, and he sat on it. Aaron and Hur held up his hands, the one on the one side, and the other on the other side. His hands were steady until sunset.
13
Joshua defeated Amalek and his people with the edge of the sword.
14
The LORD said to Moses, “Write this for a memorial in a book, and rehearse it in the ears of Joshua: that I will utterly blot out the memory of Amalek from under the sky.”
15
Moses built an altar, and called its name “The LORD our Banner”.
16
He said, “The LORD has sworn: ‘The LORD will have war with Amalek from generation to generation.’”
Chapter overviewAI-generated

Overview.
This chapter recounts two pivotal events at Rephidim: the people’s rebellion over lack of water and the first attack by the Amalekites. In the face of thirst and conflict, Israel’s faith is tested, and the LORD demonstrates both His provision and His sovereign power in sustaining His people, while also revealing the seriousness of doubting His presence.

Flow.

  • The people arrive at Rephidim, where the absence of water leads to quarreling with Moses and testing of the LORD (vv. 1–3).
  • Moses, under intense pressure, appeals to God, who instructs him to strike a rock to bring forth water, confirming His presence (vv. 4–7).
  • The location is named Massah and Meribah as a witness to Israel’s doubt (v. 7).
  • Immediately afterward, Israel faces external hostility as Amalek attacks, prompting Joshua to lead an army while Moses intercedes on the hilltop (vv. 8–13).
  • God declares perpetual judgment on Amalek, and Moses builds an altar, proclaiming the LORD as Israel’s banner of victory (vv. 14–16).

Connections.
Following chapter 16, where the LORD provided manna and quail in the wilderness, this chapter continues the theme of divine provision and Israel’s response of unbelief. The people again question God’s care, despite His recent faithfulness, setting up a pattern of testing that contrasts with the earlier miracle at the sea. This deepens the narrative tension leading into chapter 18, where Jethro’s visit introduces the need for godly leadership structure, as Moses’ role becomes increasingly vital in sustaining Israel both physically and spiritually. The victory over Amalek also anticipates the larger theme of holy war and God’s sovereignty over nations, which will inform Israel’s identity and mission.

What it teaches.
The chapter shows that God is present with His people in the wilderness, providing for their needs and defending them from enemies, yet He will not be tested with impunity. The water from the rock (WCF 7.3) signifies His covenantal faithfulness, even when His people doubt. The intercession of Moses, upheld by Aaron and Hur, prefigures the need for mediation and sustained prayer in the people’s life before God (WLC 37). The altar named “The LORD is my Banner” (Yahweh Nissi) declares that victory belongs to the LORD alone, and His war against Amalek (HC LD 10) underscores the seriousness of opposing His anointed people. The command to record this reflects the importance of remembering divine deliverance (BC 26).

Apply.
When leadership falters under pressure, God provides support through others who uphold His servant in prayer and solidarity.

AI-generated. Not a substitute for Scripture, your pastor, or the confessions.