Prayer: Remembering Two Omitted Sajdahs Before Salaam
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1253
If before saying ‘assalāmu ʿalaynā’ and ‘assalāmu ʿalaykum’ [in the salām of the prayer] one remembers that he has not performed the two sajdahs in the last rakʿah, he must perform the two sajdahs and then say tashahhud and the salām of the prayer again.