Moses
Leviticus 15:9ESV·traditional attribution

And any saddle on which the one with the discharge rides shall be unclean.

Matthew Henry Presbyterian @wholebiblehenry

We have here the law concerning the ceremonial uncleanness that was contracted by running issues in men. It is called in the margin (Lev 15:2) the running of the reins: a very grievous and loathsome disease, which was, usually the effect and consequent of wantonness and uncleanness, and a dissolute course of life, filling men's bones with the sins of their youth, and leaving them...

Commenting on Leviticus 15:1-18

John Gill Reformed Baptist @doctorgill

And what saddle soever he sitteth upon that hath the issue,.... When he rides upon any beast, horse, ass, or camel, whatever is put upon the creature, and he sits upon it, the saddle, and whatever appertains to it, the housing and girdle: shall be unclean; and not fit for another to use, but be defiling to him, as follows.

Jamieson-Fausset-Brown Reformed @jfbcommentary

what saddle . . . he rideth upon that hath the issue shall be unclean--(See on Gen 31:34).