Deuteronomy 27:5-7 NIV

5 Build there an altar1 to the LORD your God, an altar of stones. Do not use any iron tool2 upon them.

References for Deuteronomy 27:5

6 Build the altar of the LORD your God with fieldstones and offer burnt offerings on it to the LORD your God.
7 Sacrifice fellowship offeringsa3 there, eating them and rejoicing4 in the presence of the LORD your God.5

References for Deuteronomy 27:7

    • a 27:7 - Traditionally "peace offerings"