Numbers 3:46-48

Amplified Bible

⁴⁶ For the ransom (redemption price) of the 273 of the firstborn of the Israelites who outnumber the Levites, ⁴⁷ you shall take five shekels apiece, per head, you shall take them in terms of the sanctuary shekel (the shekel is twenty gerahs), ⁴⁸ and give the money, the ransom (redemption price) of those who outnumber the Levites to Aaron and to his sons.”