Shevuot 15A

וכן תעשו״⁠ – לדורות.

and so should you do” (Exodus 25:9). The final words: “And so should you do,” are superfluous and serve to teach: As was done in the Tabernacle, so should you do in future generations.

מתיב רבא: כל הכלים שעשה משה ⁠– משיחתן מקדשתן, מכאן ואילך ⁠– עבודתן מחנכתן. ואמאי? ונימא ״וכן תעשו״⁠ – לדורות!

Rava raises an objection from a baraita: With regard to all the sacred vessels that Moses fashioned, their anointment with oil consecrates them. From that point forward, in the generations after Moses, new vessels do not require anointment to be consecrated; rather, their use in the Temple service initiates them and renders them fit for use. Rava clarifies the objection: But why is this so? Let us say here as well that the phrase “and so should you do” teaches that the same must be done in future generations.

שאני התם, דאמר קרא: ״וימשחם ויקדש אתם״⁠ – אותם במשיחה, ולא לדורות במשיחה.

The Talmud answers: It is different there, as the verse states with regard to the Tabernacle and its vessels: “And he anointed them and consecrated them” (Numbers 7:1). This teaches that it is only “them,” the vessels fashioned by Moses, that are consecrated through anointment, but vessels fashioned in later generations are not consecrated through anointment.

אימא אותם ⁠– במשיחה, לדורות ⁠– או במשיחה או בעבודה! אמר רב פפא, אמר קרא: ״אשר ישרתו בם בקדש״, תלאן הכתוב בשירות.

The Talmud asks: Why not say: “Them,” the vessels made by Moses, he consecrated specifically through anointment, but vessels made in future generations are consecrated either through anointment or through their initial service? Rav Pappa said: The verse states: “And they should take all the service vessels, with which they will serve in the Sanctuary” (Numbers 4:12). The future tense “they will serve,” indicates that the verse is referring to future vessels, and the verse makes them dependent upon service, teaching that in future generations vessels will be consecrated through their initial service.