The promise centers on Jonadab’s line not lacking “a man to stand before” Yahweh, described as lasting “forever.” The text itself ties this lasting assurance to the Rechabites’ comprehensive follow-through (“kept all his precepts… done according to all that he commanded”).

Where interpretation differs (only where needed)

Two phrases carry most of the interpretive weight:

1. “Stand before me”: Some read this mainly as ongoing service or attendance in Yahweh’s presence (for example, a role recognized by God). Others read it more broadly as continued acceptance and access—a way of saying God will keep receiving the family rather than describing a specific job.

2. “Forever”: Some take it as an unqualified, unending guarantee in the strongest sense. Others take it as “for the long run” in a way that fits how prophetic speech sometimes speaks of enduring stability without specifying every detail about how history plays out.

Why the disagreement exists

The Hebrew-style wording is brief and flexible. “Stand before” can be used for serving, appearing for audience, or being approved in someone’s sight. And “forever” can function as absolute duration or as a strong way to say “enduring.” Since these verses do not spell out the mechanism (who stands, where, doing what), readers infer different levels of specificity from the same phrasing.

What this passage clearly contributes

• It presents Yahweh as publicly recognizing a family’s long-term faithfulness to an inherited command and attaching a lasting promise to it.
• It contrasts, within Jeremiah’s wider setting, consistent obedience (even to a human ancestor) with Judah’s refusal to listen to Yahweh’s repeated words.
• It introduces a durable “line” promise using the concrete image of an ongoing representative “standing before” Yahweh, leaving open whether that means formal service, continuing access, or both. Jeremiah 35:18 Jeremiah 35:19

says (’ā·mar)