Prayer: If I Mistakenly Swap Parts, Look Away, or Speak During Prayer, Does It Void the Salah?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: If I Mistakenly Swap Parts, Look Away, or Speak During Prayer, Does It Void the Salah?

English:

Question #518:

Does the prayer of a person become void if he mistakenly performs some parts of his prayer in the place of other parts, or looks away at some point during the prayer, or speaks by mistake?

Answer #518:

Unintentional acts in prayer do not bring about its invalidation. In some cases, they call for the performance of two prostrations of inadvertence or some other rulings. But, of course, the prayers are invalidated if a rukn of the prayer is repeated or missed. The same rule is applied if a person is no more in the state of saying prayer.

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