Numbers 3:46-51

46To redeem the 273 firstborn Israelites who outnumber the Levites, 47you are to collect five shekels1 for each one, according to the sanctuary shekel of twenty gerahs.2 48Give the money to Aaron and his sons as the redemption price for the excess among the Israelites.”

49So Moses collected the redemption money from those in excess of the number redeemed by the Levites. 50He collected the money from the firstborn of the Israelites: 1,365 shekels,3 according to the sanctuary shekel. 51And Moses gave the redemption money to Aaron and his sons in obedience to the word of the LORD, just as the LORD had commanded him.