Our Parsha Bamidbar deals with the numbers crunching of the census taken “on the first of the second month, in the second year after their exodus from… Mitzriyim.” (Sefer Bamidbar, Perek 1, posuk 1)
This author addressed the transference of the Kehuna (priesthood) from the first-borns to the Kohanim in vorts on Parshat Ki Tisa in successive years.
But the Kehuna was not all that was taken from the first-born after the Eigel Zahav — the golden calf. The census of our parsha Bamidbar reveals that Hashem kavei’yokel (as He is) transferred, replaced, or as the word is used in the parsha — “redeemed”, the Kedusha of the first-borns through the Levi’im. Our parsha states (Artscroll Chumash rendering of Sefer Bamidbar, Perek 3, posukim 11-12):