Ruling 1097
If a person forgets something that is not a rukn and performs the rukn that comes after it – for example, he forgets Sūrat al-Ḥamd and starts performing rukūʿ – his prayer is valid.
Prayer: Forgetting a Non-Rukn and Performing the Next Rukn
Practical Laws of Islam as per the teachings of Ayatullah Sistani
