Albert Barnes Commentary 1 Kings 14:15

"For Jehovah will smite Israel, as a reed is shaken in the water; and he will root up Israel out of this good land which he gave to their fathers, and will scatter them beyond the River, because they have made their Asherim, provoking Jehovah to anger." — 1 Kings 14:15 (ASV)

The general prophecy of Moses in Deuteronomy 29:28, that the disobedient Israelites would be rooted out of their land and cast into another, is repeated here for the first time. It is definitively applied to the ten tribes, which are to be removed “beyond the river” (the Euphrates; 1 Kings 4:21, 24) and “scattered.” On the fulfillment of this prophecy, and especially on the “scattering” of the ten tribes, see the note on 2 Kings 17:6.

Groves - See the note on Exodus 34:13. The grove (or “asherah”) worship, adopted from the Canaanite nations, appears to have died away after the fierce onslaught Gideon made against it (Judges 6:25–31). It now revived and became one of the most popular idolatries in both Israel and Judah (1 Kings 14:23; compare the marginal references).