Jamieson, Fausset and Brown on Jeremiah 29:7

7. (Ezr 6:10; Ro 13:1; 1Ti 2:2). Not only bear the Babylonian yoke patiently, but pray for your masters, that is, while the captivity lasts. God's good time was to come when they were to pray for Babylon's downfall (Jr 51:35; Psa 137:8). They were not to forestall that time. True religion teaches patient submission, not sedition, even though the prince be an unbeliever. In all states of life let us not throw away the comfort we may have, because we have not all we would have. There is here a foretaste of gospel love towards enemies (Mt 5:44).