The Method of Offering the Prostration of Inadvertence

1258. Immediately after the Salam of prayers, one should make a niyyat of performing Sajdah, placing one's forehead, as an obligatory precaution, on an object which is allowed. It is a recommended precaution that Zikr be recited, and a better Zikr is: Bismillahi wa billah assalamu 'alayka ayyuhan Nabiyyu wa rahmatullahi wa barakatuh.

Then one should sit up and perform another Sajdah reciting the above mentioned Zikr. After performing the second Sajdah one should sit up again and recite tashahhud and then say: Assalamu 'alaykum'; it is better to add to it: Wa rahmatullahi wa barakatuh.