The difference between the number of firstborn Israelites (22,273) and the number of Levites (22,000) in Numbers 3:43–46, which had to be redeemed with money.
In Numbers 4:39–51, there were counted 22,273 firstborn Israelites, while the Levites who were to replace them numbered 22,000. The remaining 273 had to be redeemed with five shekels of silver per person according to the sanctuary weight, totaling 1,365 shekels, which was given to Aaron and his sons. The number thus symbolizes redemption (pidyon) — the idea that every human life has value to God and must be accounted for. This story shows that God’s claim on the firstborn is absolute and concrete: no one goes uncounted, and even a surplus of 273 individuals requires a formal act of redemption. The principle from this text continues in Jewish tradition through pidyon ha-ben (פדיון הבן), the redemption of the firstborn son, which is still practiced today. A kohen receives five silver coins as symbolic ransom money 30 days after birth. The amount of five shekels is calculated according to the sanctuary weight (Numbers 3:47), which, according to rabbinic tradition, equaled 20 gerahs per shekel. This standard ensured a fixed and fair valuation regardless of local currency variations. Some rabbinic commentators have discussed how it was decided which 273 of the 22,273 firstborn had to pay ransom money. According to the Talmud (Sanhedrin 17a) and Rashi, lots were cast to determine who would be redeemed by the Levites and who would have to pay five shekels.*