Treasury of Scripture Knowledge
Summary
And if thou wilt make me an altar of stone, thou shalt not build it of hewn stone: for if thou lift up thy tool upon it, thou hast polluted it.
General references
Bible References
And
Deuteronomy 27:5
Build an altar of stones there to the Lord your God—you must not use any iron tool on them.
Joshua 8:31
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.
General references
Leviticus 16:33
and purify the most holy place. He will purify the tent of meeting and the altar and will make atonement for the priests and all the people of the assembly.