21 Do not set up any wooden Asherah pole beside the altar you build to the LORD your God,

Read Deuteronomy 16:21 Using Other Translations

Thou shalt not plant thee a grove of any trees near unto the altar of the LORD thy God, which thou shalt make thee.
"You shall not plant any tree as an Asherah beside the altar of the LORD your God that you shall make.
“You must never set up a wooden Asherah pole beside the altar you build for the LORD your God.