Thou shalt not plant thee a grove of any trees........

At the end of Deuteronomy 16 is a peculiar verse which serves as a good illustration of how Scripture interprets itself. One could do this with a good concordance or cross reference. A good, commentary, such as, John Gill's and an E Bible  like e–sword HD, makes the navigation through the verses insightful and easy.

The verse is 16:21. Which talks about not planting trees. By itself, why is that prohibitive?

Deu 16:21    Thou shalt not plant thee a grove of any trees near unto the altar of the LORD thy God, which thou shalt make thee.

As you can see the end of the verse qualifies this to be not near unto the altar of the Lord by God.

Further verse 22 puts this in context with not making an image or Idol.

Deu 16:22    Neither shalt thou set thee up any image; which the LORD thy God hateth.

The temptation to worship idols and images was much too great through out the history of Israel.

I wonder if the same can be said today?

John Gil in his commentary references 2 Kings 18:4

Deuteronomy 16:21

Thou shall not plant thee a grove of any trees,.... Of any sort of trees, as oaks or any other; not but that it was lawful to plant trees and groves of them, but not for a religious or idolatrous use: particularly

near unto the altar of the Lord thy God, which thou shalt make thee; as the Heathens did near their altars, lest it should be thought to be done for a like superstitious and idolatrous use; which evil the Jews sometimes fell into in the times of wicked reigns, and which their good and pious kings removed and destroyed; see 2Ki 18:4 and Hecataeus (b), an Heathen historian, relates of the city of Jerusalem, that there were there no image, nor plantation, nor grove, nor any such thing.

(b) Apud Euseb. Praepar. Evangel. l. 9. c. 4. p. 408.

This first further clarifies the prohibition. Hezekiah cut down the groves and the verse mentions an Idol called Nehustan.

The verse says.

2Ki 18:4    He removed the high places, and brake the images, and cut down the groves, and brake in pieces the brasen serpent that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan.

What is Nehushtan?

("brazen"). 2Ki 18:4, "a piece of brass." The contemptuous name (so the Septuagint, Vulgate, etc.) given to the brazen serpent when Hezekiah broke it in pieces because it was made an idol of, Israel burning incense to it because of its original use in the typical miracle (Num 21:8-9; Joh 3:14). The Targum of Jonathan, the Peshito Syriac, and Buxtorf less forcibly make Nehushtan the name by which the brass serpent had been generally known. A prescient protest against relic worship.

And the explanation of this verse leads us to Judges 3:7

2 Kings 18:4

He removed the high places,.... Which the best of the kings of Judah never attempted, and which is observed of them to their discredit:

and broke the images, and cut down the groves; the idols his father set up and served, 2Ki 16:4, groves and idols in them, were early instances of idolatry; See Gill on Jdg 3:7, and their use for temples are still continued, not only among some Indian nations (l), but among some Christians in the northern parts of Europe (m):

and brake in pieces the brazen serpent that Moses had made; which he made in the wilderness, and which was brought by the children of Israel with them into the land of Canaan, and was kept as a memorial of the miracle wrought by looking to it, being laid up in some proper place where it had been preserved to this day:

for unto those days the children of Israel did burn incense to it not from the time it was brought into Canaan, nor even in later times, in the days of Asa and Jehoshaphat, who would never have suffered it; very probably this piece of idolatry began in the times of Ahaz, who encouraged everything of that kind: for this serpent they had a great veneration, being made by Moses, and a means in his time of healing the Israelites; and they imagined it might be of some service to them, in a way of mediation to God; and worthy of worship, having some degree of divinity, as Kimchi and Ben Gersom; but Laniado (n) excuses them from all show of idolatry, and supposes what they did was for the honour of God only; hence sprung the heresy of the Ophites, according to Theodoret:

and he called it Nehushtan; perceiving they were ensnared by it, and drawn into idolatry to it, by way of contempt he called it by this name, which signifies "brass"; suggesting that it was only a mere piece of brass, had no divinity in it, and could be of no service to them in divine things; and, that it might no longer be a snare to them, he broke it into pieces; and, as the Jews (o) say, ground it to powder, and scattered it to every wind, that there might be no remains of it.

(l) See Dampier's Voyage, vol. 1. p. 411. (m) Vid. Fabritii Bibliograph. Antiqu. c. 9. sect. 11. (n) Cli Yaker, fol. 538. 2. (o) T. Bab. Avodah Zarah, fol. 44. 1.

Jdg 3:7    And the children of Israel did evil in the sight of the LORD, and forgat the LORD their God, and served Baalim and the groves.

This verse in turn presents another false god worshiped in the  groves. A practice that appears to be quite common.....

Judges 3:7

And the children of Israel did evil in the sight of the Lord,.... Both by marrying with Heathens, and worshipping their gods:

and forgot the Lord their God; as if they had never heard of him, or known him, their Maker and Preserver, who had done so many great and good things for them:

and served Baalim, and the groves; of Baalim, see Jdg 2:11; the groves mean either idols worshipped in groves, as Jupiter was worshipped in a grove of oaks, hence the oak of Dodona; and Apollo in a grove of laurels in Daphne: there were usually groves where idol temples were built; and so in Phoenicia, or Canaan, Dido the Sidonian queen built a temple for Juno in the midst of the city, where was a grove of an agreeable shade (d): so Barthius (e) observes, that most of the ancient gods of the Heathens used to be worshipped in groves. And groves and trees themselves were worshipped; so Tacitus says (f) of the Germans, that they consecrated groves and forests, and called them by the names of gods. Groves are here put in the place of Ashtaroth, Jdg 2:13; perhaps the goddesses of that name were worshipped in groves; and if Diana is meant by Astarte, Servius (g) says that every oak is sacred to Jupiter and every grove to Diana; and Ovid (h) speaks of a temple of Diana in a grove. But as they are joined with Baalim, the original of which were deified kings and heroes, the groves may be such as were consecrated to them; for, as the same writer observes (i), the souls of heroes were supposed to have their abode in groves; See Gill on Exo 34:13 and See Gill on Deu 7:5. It was in this time of defection that the idolatry of Micah, and of the Danites, and the war of Benjamin about the Levite's concubine, happened, though related at the end of the book; so Josephus (k) places the account here.

(d) "Lucus in urbe fuit media", &c. Virgil. Aeneid. l. 1. (e) Animadv. ad Claudian. de raptu Proserp. l. 1. v. 205. (f) De mor. German. c. 9. Vid. Plin. l. 12. 1. (g) In Virgil. Georgic. l. 3. col. 295. (h) "Est nemus et piceis", &c. Ep. 12. v. 67. Vid. Metamorph. l. 11. Fab. 9. v. 560. (i) In Virgil. Aeneid. l. 1. col. 481. & in l. 3. col. 721. (k) Antiqu. l. 5. c. 2. & 3.