Jeremiah 35:18,19 - Joseph Benson’s Commentary on the Old and New Testaments

Jeremiah said unto the house of the Rechabites, &c. Mercy is here promised to the family of the Rechabites for their steady and unanimous adherence to the laws of their house. Though it was only for the shaming of Israel that their constancy was tried, yet, being unshaken, God takes occasion from it to tell them that he had blessings in reserve for them. Jonadab shall not want a man to stand before me for ever “The meaning of this promise,” says Blaney, “in its full extent, seems to be, not only that the race of Jonadab should never fail or be extinct, but that some of the family should ever be found among the worshippers of the true God. For to stand in the presence of a prince, implies an attendance, in some degree, upon his person and service. So the queen of Sheba, speaking of Solomon's court, says, Happy are thy men, happy are these thy servants, which stand continually before thee, 1 Kings 10:8; and therefore, to stand before God, must denote at least the privilege of treading his courts, and of worshipping him among the train of his chosen servants and people.”