Joseph Benson's Commentary of the Old and New Testaments - Jeremiah 12:2-3
Jeremiah 12:2-3. Thou hast planted them In a rich soil, by thy power: they have taken root; they grow Their prosperity seems to be confirmed and settled by thy providence. Thou art near in their mouth, and far from their reins They talk of thee, and profess piety, but do not believe in and obey thee from their hearts; the true character this of hypocrites, who, according to Isaiah, honour God with their mouths, but their hearts are far from him, Isaiah 29:13. But thou, O Lord, knowest... read more
Albert Barnes' Notes on the Whole Bible - Jeremiah 12:2
Their veins - i. e., their heart. The reins were regarded by the Jews as the seat of the affections. read more