וְכָל־הַמֶּרְכָּ֗ב אֲשֶׁ֨ר יִרְכַּ֥ב עָלָ֛יו הַזָּ֖ב יִטְמָֽא׃
And what saddle soever he that hath the issue rideth upon shall be unclean.
Targum Jonathan on Leviticus
And every girdle or saddle upon which he who hath an issue rideth shall be unclean.