Moses
Numbers 5:10ESV·traditional attribution

Each one shall keep his holy donations: whatever anyone gives to the priest shall be his.”

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A command for the purifying of the camp, by turning out from within its lines all those that were ceremonially unclean, by issues, leprosies, or the touch of dead bodies, until they were cleansed according to the law, Num 5:2, Num 5:3. 1. These orders are executed immediately, Num 5:4.

Commenting on Numbers 5:1-10

John Gill Reformed Baptist @doctorgill

And every man's hallowed things shall be his,.... Which he, by a vow or freewill offering, separates to holy uses; these are at his own dispose, to give to what priest he will, or they are the priest's; for what a man devotes to the Lord is to be given to them, or such things as God has hallowed, sanctified, and set apart for sacred...

Keil & Delitzsch Lutheran @keilanddelitzsch

Num 5:5-10 Restitution in Case of a Trespass. - No crime against the property of a neighbour was to remain without expiation in the congregation of Israel, which was encamped or dwelt around the sanctuary of Jehovah; and the wrong committed was not to remain without restitution, because such crimes involved unfaithfulness (מעל, see Lev 5:15) towards Jehovah.

Commenting on Numbers 5:5-10