Numbers Chapter 3, Verse 13
From BibleWiki
13: Because all the firstborn are mine; for on the day that I
smote all the firstborn in the land of Egypt I hallowed unto
me all the firstborn in Israel, both man and beast: mine shall
they be: I am the LORD.
13: For every firstborn is mine: since I struck the firstborn in the
land of Egypt: I have sanctified to myself whatsoever is firstborn in
Israel both of man and beast, they are mine: I am the Lord.
13: For every first-born [is] mine; in the day in which I smote every first-born in the land of Egypt, I sanctified to myself every first-born in Israel: both of man and beast, they shall be mine: I [am] the Lord.
Numbers Chapter 3, Verse 13/commentary

