Numbers 3:47-49

EasyEnglish Bible

⁴⁷ You must accept five shekels for each extra firstborn male. The shekel must have the same weight as the shekel that the Levites use in God's tabernacle. There are 20 gerahs in one shekel. ⁴⁸ Give that money to Aaron and his sons.’

⁴⁹ So Moses took the money to buy back the extra 273 firstborn sons. That was because the number of firstborn sons was more than the number of Levites.