22 Anyone who touches anything she sits on will be unclean; they must wash their clothes and bathe with water, and they will be unclean till evening.

Read Leviticus 15:22 Using Other Translations

And whosoever toucheth any thing that she sat upon shall wash his clothes, and bathe himself in water, and be unclean until the even.
And whoever touches anything on which she sits shall wash his clothes and bathe himself in water and be unclean until the evening.
If you touch any object she has sat on, you must wash your clothes and bathe yourself in water, and you will remain unclean until evening.