'Altar' in the Bible

At that time Joshua built an altar on Mount Ebal to the Lord, the God of Israel,

just as Moses the Lord’s servant had commanded the Israelites. He built it according to what is written in the book of the law of Moses: an altar of uncut stones on which no iron tool has been used. Then they offered burnt offerings to the Lord and sacrificed fellowship offerings on it.

On that day he made them woodcutters and water carriers—as they are today—for the community and for the Lord’s altar at the place He would choose.

When they came to the region of the Jordan in the land of Canaan, the Reubenites, Gadites, and half the tribe of Manasseh built a large, impressive altar there by the Jordan.

Then the Israelites heard it said, “Look, the Reubenites, Gadites, and half the tribe of Manasseh have built an altar on the frontier of the land of Canaan at the region of the Jordan, on the Israelite side.”

“This is what the Lord’s entire community says: ‘What is this treachery you have committed today against the God of Israel by turning away from the Lord and building an altar for yourselves, so that you are in rebellion against the Lord today?

But if the land you possess is defiled, cross over to the land the Lord possesses where the Lord’s tabernacle stands, and take possession of it among us. But don’t rebel against the Lord or against us by building for yourselves an altar other than the altar of the Lord our God.

that we have built for ourselves an altar to turn away from Him. May the Lord Himself hold us accountable if we intended to offer burnt offerings and grain offerings on it, or to sacrifice fellowship offerings on it.

“Therefore we said: Let us take action and build an altar for ourselves, but not for burnt offering or sacrifice.

We thought that if they said this to us or to our generations in the future, we would reply: Look at the replica of the Lord’s altar that our fathers made, not for burnt offering or sacrifice, but as a witness between us and you.

We would never rebel against the Lord or turn away from Him today by building an altar for burnt offering, grain offering, or sacrifice, other than the altar of the Lord our God, which is in front of His tabernacle.”

So the Reubenites and Gadites named the altar: It is a witness between us that the Lord is God.