Charles Ellicott Commentary Jeremiah 12:2

"Thou hast planted them, yea, they have taken root; they grow, yea, they bring forth fruit: thou art near in their mouth, and far from their heart." — Jeremiah 12:2 (ASV)

You have planted them. —The words express, of course, the questioning distrust of the prophet. The wicked flourish, so that one would think God had indeed planted them. Yet all the while they were mocking Him with hypocritical worship (here we have an echo of Isaiah 29:13), uttering His name with their lips while He was far from that innermost being which the Hebrew symbolised by the “reins.”