Numbers 31:20
And purify every garment and leather good, everything made of goat's hair, and every article of wood."

Leviticus 11:32
When one of them dies and falls on something, it becomes unclean; any article of wood, clothing, leather, sackcloth, or any implement used for work must be rinsed with water and will remain unclean until evening; then it will be clean.

Leviticus 14:36
The priest must order that the house be cleared before he enters it to examine the mildew, lest everything in the house becomes unclean. After this, the priest shall go in to inspect the house.