Tasbih and Clearing the Throat in Prayer

Question:
Between the Glorious One, does it appear that speech invalidates the prayer, or is it like the tasbih after one has completed this?

Answer:
Tasbih is not speech that invalidates the prayer. Tasbih is a prescribed remembrance in the prayer. If one says something prescribed in the prayer, there is no problem; it does not affect the prayer. That is, its type is prescribed in the prayer. The speech that is not prescribed in its type in the prayer, such as "O so-and-so, when did you come?" or "So-and-so has left," or "this is not prescribed in the prayer." But "Subhan Allah" or reciting a verse from the Book of Allah to alert the imam, or what not, is prescribed in the prayer. Sitting is prescribed in the prayer, so it does not affect it. It does not affect the prayer.
Likewise, clearing the throat out of necessity is permissible. The Prophet (peace and blessings be upon him), when 'Ali ibn Abi Talib asked for permission to enter while he was in prayer, would clear his throat for him. If it is out of necessity, such as if someone speaks to ask for permission while you are in prayer, you clear your throat to alert him that you are in prayer, as the Prophet (peace and blessings be upon him) did. There is no harm in that out of necessity. But if a person clears his throat without necessity, this is disliked in the prayer. It is disliked in the prayer to clear one's throat without necessity, but it does not invalidate the prayer.