Jeremiah 35:16-19

16The sons of Jonadab the son of Rechab have kept the command that their father gave them, but this people has not obeyed me.

17Therefore, thus says the Lord, the God of hosts, the God of Israel: Behold, I am bringing upon Judah and all the inhabitants of Jerusalem all the disaster that I have pronounced against them, because I have spoken to them and they have not listened, I have called to them and they have not answered."

18But to the house of the Rechabites Jeremiah said, "Thus says the Lord of hosts, the God of Israel: Because you have obeyed the command of Jonadab your father and kept all his precepts and done all that he commanded you,

19therefore thus says the Lord of hosts, the God of Israel: Jonadab the son of Rechab shall never lack a man to stand before me."