Numbers 8:16-17
Read Numbers 8 in full →16for they are awholly given to Me from among the sons of Israel. I have taken them for Myself binstead of every first issue of the womb, the firstborn of all the sons of Israel. 17“For aevery firstborn among the sons of Israel is Mine, among the men and among the animals; on the day that I struck down all the firstborn in the land of Egypt I sanctified them for Myself.