Does a person prostrate when reciting the verse of prostration (Sajdah) in the prayer, or does prostrating in the prayer invalidate it?

Question:
He says: Honorable Shaykh, may Allah grant you success, does one prostrate when reciting the verse of prostration in Surat Sad in the prayer? And is it true that it invalidates the prayer of the one who prostrates to it?

Answer:
There is scholarly disagreement on this: is it a prostration of gratitude or a prostration of recitation? Some say it is a prostration of gratitude, and the prostration of gratitude is not performed in the prayer, so if one does it, his prayer is invalid. Others say it is a prostration of recitation; Dawud (peace be upon him) prostrated to it, so we prostrate to it, and the Messenger (peace and blessings be upon him) prostrated to it and said: So follow their guidance. The correct view is that it is a prostration of recitation, that one prostrates to it. Yes.