Bemiḏbar (Numbers) 3:12-13

“Now look, I Myself have taken the Lĕwites from among the children of Yisra’ĕl instead of every first-born who opens the womb among the children of Yisra’ĕl. And the Lĕwites shall be Mine, “because all the first-born are Mine. On the day that I struck all the first-born in the land of Mitsrayim, I set apart to Myself all the first-born in Yisra’ĕl, both man and beast. They are Mine, I am יהוה.