'Altar' in the Bible

Then Joshua built an altar to the Lord, the God of Israel, in Mount Ebal,

just as Moses the servant of the Lord had commanded the sons of Israel, as it is written in the book of the law of Moses, an altar of uncut stones on which no man had wielded an iron tool; and they offered burnt offerings on it to the Lord, and sacrificed peace offerings.

But Joshua made them that day hewers of wood and drawers of water for the congregation and for the altar of the Lord, to this day, in the place which He would choose.

When they came to the region of the Jordan which is in the land of Canaan, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh built an altar there by the Jordan, a large altar in appearance.

And the sons of Israel heard it said, “Behold, the sons of Reuben and the sons of Gad and the half-tribe of Manasseh have built an altar at the frontier of the land of Canaan, in the region of the Jordan, on the side belonging to the sons of Israel.”

“Thus says the whole congregation of the Lord, ‘What is this unfaithful act which you have committed against the God of Israel, turning away from following the Lord this day, by building yourselves an altar, to rebel against the Lord this day?

If, however, the land of your possession is unclean, then cross into the land of the possession of the Lord, where the Lord’s tabernacle stands, and take possession among us. Only do not rebel against the Lord, or rebel against us by building an altar for yourselves, besides the altar of the Lord our God.

If we have built us an altar to turn away from following the Lord, or if to offer a burnt offering or grain offering on it, or if to offer sacrifices of peace offerings on it, may the Lord Himself require it.

“Therefore we said, ‘Let us build an altar, not for burnt offering or for sacrifice;

Therefore we said, ‘It shall also come about if they say this to us or to our generations in time to come, then we shall say, “See the copy of the altar of the Lord which our fathers made, not for burnt offering or for sacrifice; rather it is a witness between us and you.”’

Far be it from us that we should rebel against the Lord and turn away from following the Lord this day, by building an altar for burnt offering, for grain offering or for sacrifice, besides the altar of the Lord our God which is before His tabernacle.”

The sons of Reuben and the sons of Gad called the altar Witness; “For,” they said, “it is a witness between us that the Lord is God.”