Jeremiah 35:19

therefore thus saith the Lord of hosts, the God of Israel, Jonadab, the son of Rechab, shall not want a man to stand before Me forever, that is, the family of the Rechabites would not die out, and it would continue in the worship of Jehovah without interruption. According to the accounts of trustworthy travelers, the descendants of Rechab are still living in the desert of Yemen, near Senaar, on the border of Mesopotamia and Arabia. Thus the Lord rewards the careful observance of the Fourth Commandment by blessings continuing through many generations.