Leviticus 15:4-8

4Every bed on which the one who has the discharge lies becomes unclean, and everything on which he sits becomes unclean.

5Whoever touches his bed shall wash his clothes, and bathe in water, and be unclean until evening;

6and 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.

7Also whoever touches the man with the discharge shall wash his clothes and bathe in water, and be unclean until evening.

8And 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.