Matthew 15:13

Every plant - Every plantation. So I render φυτεια, and so it is translated in the Itala version which accompanies the Greek text in the Codex Bezae, omnis plantatio, and so the word is rendered by Suidas. This gives a different turn to the text. The Pharisees, as a religious body, were now a plantation of trees, which God did not plant, water, nor own: therefore, they should be rooted up, not left to wither and die, but the fellers, and those who root up, (the Roman armies), should come against and destroy them, and the Christian Church was to be planted in their place. Since the general dispersion of the Jews, this sect, I believe, has ceased to exist as a separate body, among the descendants of Jacob. The first of the apostolical constitutions begins thus: Θεου φυτεια η καθολικη εκκλησια, και αμπελων αυτου εκλεκτος. The Catholic Church is the plantation of God, and his chosen vineyard.

Every plant ... - Religious doctrine is not inaptly compared to a plant. See 1 Corinthians 3:6-8. It is planted in the mind for the purpose of producing fruit in the life, or right conduct. Jesus here says that all those doctrines of which his Father was not the author must be rooted up or corrected. The false doctrines of the Pharisees, therefore, must be attacked, and it was no wonder if they were indignant. It could not be helped. It was his duty to attack them. He was not surprised that they were enraged; but, notwithstanding their opposition, their doctrine should be destroyed.

15:13 Every plant - That is, every doctrine.