Charles Ellicott Commentary Jeremiah 2:7

"And I brought you into a plentiful land, to eat the fruit thereof and the goodness thereof; but when ye entered, ye defiled my land, and made my heritage an abomination." — Jeremiah 2:7 (ASV)

A plentiful country. —Literally, a land of Carmel, that word, as meaning a vine-clad hill, having become a type of plenty. So the forest of his Carmel, in Isaiah 37:24; elsewhere, as in Isaiah 10:18 and Isaiah 32:15, fruitful. The Septuagint treats the word as a proper name: I brought you unto Carmel.

When you entered. —The words point to the rapid degeneracy of Israel after the settlement in Canaan, as seen in the false worship and foul crimes of Judges 17-21. So in Psalm 78:56-58. Instead of being the pattern nation, the firstfruits of mankind, they sank to the level, or below the level, of the heathen.