Deuteronomy 27:5
And there you shall build an altar to the LORD your God, an altar of stones. You shall wield no iron tool on them;
Exodus 20:25
If you make me an altar of stone, you shall not build it of hewn stones, for if you wield your tool on it you profane it.
Exodus 24:4
And Moses wrote down all the words of the LORD. He rose early in the morning and built an altar at the foot of the mountain, and twelve pillars, according to the twelve tribes of Israel.
Joshua 8:30-31
At that time Joshua built an altar to the LORD, the God of Israel, on Mount Ebal,
1 Kings 18:31-32
Elijah took twelve stones, according to the number of the tribes of the sons of Jacob, to whom the word of the LORD came, saying, "Israel shall be your name,"