46 To redeem the 273 firstborn Israelites who outnumber the Levites,
Numbers 3:46 Cross References - MSB
Exodus 13:13
13 You must redeem every firstborn donkey with a lamb, and if you do not redeem it, you are to break its neck. And every firstborn of your sons you must redeem.
Numbers 18:15-16
15 The firstborn of every womb, whether man or beast, that is offered to the LORD belongs to you. But you must surely redeem every firstborn son and every firstborn male of unclean animals.
16 You are to pay the redemption price for a month-old male according to your valuation: five shekels of silver, according to the sanctuary shekel, which is twenty gerahs.