Prayer: Does Cat Hair or Saliva on Clothes Invalidate Prayer?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: Does Cat Hair or Saliva on Clothes Invalidate Prayer?

English:

Question #439:

Does the existence of the hair or saliva of a cat on a person’s clothes cause his/her prayer to be invalid?

Answer #439:

Yes, it invalidates the prayer.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer