Numbers 3:45-47

New Century Version

⁴⁵ “Take the Levites instead of all the firstborn sons of the Israelites, and take the animals of the Levites instead of the animals of the other people. The Levites are mine. I am the Lord. ⁴⁶ Since there are 273 more firstborn sons than Levites, ⁴⁷ collect two ounces of silver for each of the 273 sons. Use the measure as set by the Holy Place, which is two-fifths of an ounce.