וַיִּתֵּ֨ן מֹשֶׁ֜ה אֶת־כֶּ֧סֶף הַפְּדֻיִ֛ם לְאַהֲרֹ֥ן וּלְבָנָ֖יו עַל־פִּ֣י יְהוָ֑ה כַּאֲשֶׁ֛ר צִוָּ֥ה יְהוָ֖ה אֶת־מֹשֶֽׁה׃ (פ)
And Moses gave the redemption-money unto Aaron and to his sons, according to the word of the LORD, as the LORD commanded Moses.
Read halakhic rulings (Jewish law) on Numbers 3:51: and classical halakhic sources.