"THE apostle says that "whatsoever things were written aforetime were written for our learning." We may draw a very useful lesson from the case of the Rechabites, who were commendably tenacious of the commandments of their fathers.
There is always a disposition in man to do as his ancestors do, without ever inquiring
whether it is right or wrong.
God commands that we shall be baptized, but the majority of professed Christians are willing to do almost anything in the world but to render faithful obedience to the word.
The Lord commands that men shall do no work on the seventh day, but the great majority of professed Christians are willing to do anything at all but to obey the plain commandment of God in this matter.
This choice has been made, and is being made by thousands as the days go by.
And the children of Jonadab, the son of Rechab, will arise in the judgment with this generation and condemn it because they obeyed the commandment of their father, and these will not obey the plain commandment of God.
The Lord has given his commandments, precept upon precept, and line upon line; he now sends a message to all nations, saying with a loud voice: "If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, the same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation. . . . Here is the patience of the saints; here are they that keep the commandments of God, and the faith of Jesus." Rev. 14:9-12.
Q: How many of the people of our day are going to be condemned by "faithful Rechabites," as were the people of God?"
A.T. Jones
"Rechabites’ strict rules were put in place by a son (or descendant) of
Rechab named Jehonadab (or Jonadab). This is the same Jehonadab who
helped Jehu rid Israel of Baal-worship after the time of Ahab (2 Kings 10:15–27).
....he sought to preserve the primitive lifestyle of
his nomadic forebears.
God used the faithfulness of the Rechabites to teach an important lesson
to His people. The Lord told Jeremiah, “Go to the Rekabite family and
invite them to come to one of the side rooms of the house of the LORD
and give them wine to drink” (Jeremiah 35:2).
The prophet gathered the Rechabites into the house of the 
LORD and set
bowls of wine in front of them (verses 3–5). The Rechabites firmly
declined the wine and explained the command of their forefather (verse
6). They remained faithful to their family tradition.
God then told Jeremiah to go and tell the people of Judah to learn a
lesson from the Rechabites’ faithful obedience to Jehonadab (Jeremiah 35:12–14). God contrasted the obedience of the Rechabites to the disobedience of His own people." GotQuestions