Thou shalt not plant thee a grove To plant groves in honour of the true God, was a part of primitive worship, as we see by the example of Abraham, Genesis 21:33. But the Gentiles having abused this custom, and made trees and groves, dedicated to their idols, the scenes of the most vile and abominable superstitions, God saw fit to prohibit the Israelites from planting any such groves near the place of divine worship, lest they should have taken occasion from hence to blend the worship of idols, and the impure rites of heathenism, with the service of the true God.
Related Commentaries of Deuteronomy 16:21
Deuteronomy 16:21
21 Thou shalt not plant thee a grove of any trees near unto the altar of the LORD thy God, which thou shalt make thee.