Jeremiah 35:18-19

18Then Jeremiah said to the house of the Rechabites, “Thus says the Lord of hosts, the God of Israel, ‘Because you have obeyed the command of Jonadab your father and have kept all his commands and have done according to all that he commanded you,

19therefore thus says the Lord of hosts, the God of Israel, “Jonadab the son of Rechab shall never fail to have a man (descendant) to stand before Me always.” ’ ”