Rashi on Numbers 3:46/רש"י על במדבר ג׳:מ״ו

1ואת פדויי השלשה וגו׳ AND AS FOR THOSE THAT ARE TO BE REDEEMED [OF THE TWO HUNDRED THREESCORE AND THIRTEEN etc.]… [THOU SHALT TAKE…] — This means, “and as for those firstborn who are yet to be redeemed among them (the Israelites), viz., the 273 who were in excess among them, being more than the 22,000 Levites, of them thou shalt take חמשת שקלים לגלגלת FIVE SHEKELS BY THE POLL, such, viz., twenty pieces of silver, was the selling price of Joseph who was Rachel’s firstborn. (Jerusalem Talmud Shekalim 2:4; Genesis Rabbah 84:18).