Numbers 3:46-51

46For the ransom (redemption price) of the 273 of the firstborn of the Israelites who outnumber the Levites,

47you shall take five shekels apiece, per head, you shall take them in terms of the sanctuary shekel (the shekel is twenty gerahs),

48and give the money, the ransom (redemption price) of those who outnumber the Levites to Aaron and to his sons.”

49So Moses took the ransom (redemption) money from those who were in excess, beyond those ransomed by the Levites;

50from the firstborn of the Israelites he took the money in terms of the sanctuary shekel, 1,365 shekels.

51Then Moses gave the ransom money to Aaron and to his sons at the command of the Lord, just as the Lord had commanded Moses.