וַיִּקַּ֣ח מֹשֶׁ֔ה אֵ֖ת כֶּ֣סֶף הַפִּדְי֑וֹם מֵאֵת֙ הָעֹ֣דְפִ֔ים עַ֖ל פְּדוּיֵ֥י הַלְוִיִּֽם׃
And Moses took the redemption-money from them that were over and above them that were redeemed by the Levites;
Read halakhic rulings (Jewish law) on Numbers 3:49: and classical halakhic sources.