Leviticus 15:4-9

Every bed on which the one who has the discharge lies becomes unclean, and everything on which he sits becomes unclean. Whoever touches his bed shall wash his clothes, and bathe in water, and be unclean until evening; and whoever sits on anything on which the man with the discharge has been sitting shall wash his clothes and bathe in water, and be unclean until evening. Also whoever touches the man with the discharge shall wash his clothes and bathe in water, and be unclean until evening. And if he who has the discharge spits on one who is clean, then he shall wash his clothes and bathe in water, and be unclean until evening. Any saddle on which the man with the discharge rides becomes unclean.