Link Deut 27:5 & Exod 20:25 on altars?
What connections exist between Deuteronomy 27:5 and Exodus 20:25 regarding altar construction?

Shared wording and instruction

Exodus 20:25: “But if you make an altar of stones for Me, you must not build it with dressed stones; if you wield a tool on it, you will defile it.”

Deuteronomy 27:5: “And there you are to build an altar to the LORD your God, an altar of stones; you must not use an iron tool on them.”

Key connections between the two passages

- Same command, two settings

Exodus 20:25 is given at Sinai when Israel first receives the covenant.

Deuteronomy 27:5 repeats it as Israel prepares to enter the land, underscoring that nothing about worship is to change with geography or time.

- Uncut stones required

• “Dressed stones” and “iron tool” describe any human alteration.

• God alone provides what is acceptable; human modification risks introducing impurity (compare Joshua 8:30–31, which cites both passages as Joshua obeys them).

- Worship grounded in humility

• Unhewn stones keep worshipers from boasting in craftsmanship (Ephesians 2:9).

• The focus remains on the God who gives the altar, not on human artistry (Acts 17:24–25).

- Holiness safeguarded

• Tools symbolize violence and shed blood (Genesis 4:22; Isaiah 2:4).

• By banning metal implements, God distances the altar from associations of war or self–exaltation (Isaiah 57:15).

- Covenant continuity

• First generation (Exodus) and second generation (Deuteronomy) receive the same altar instruction, displaying the unchanging nature of God’s law (Malachi 3:6).

• The altar thus becomes a physical reminder that covenant faithfulness is non-negotiable across generations (Psalm 78:5–7).

- Foreshadowing of a perfect, God-provided sacrifice

• Just as the stones are left in their God-given state, so the ultimate sacrifice—Christ—needs no human enhancement (Hebrews 9:14).

• Salvation rests entirely on God’s initiative; human effort can only “defile” it (Galatians 2:21).

Summary

Both Deuteronomy 27:5 and Exodus 20:25 uphold the same principle: true worship must rely on what God provides, untouched by human pride or violence. The uncut-stone altar symbolizes purity, humility, covenant fidelity, and ultimately points to the sufficiency of the sacrifice God Himself supplies in Christ.

How does Deuteronomy 27:5 emphasize purity in worship practices?
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