Assalmualaikum, I think I made a mistake in sajda sahw (i'm not sure if I prostated 2 or 3 times) should i regard this as wasawas, is it permissible to do sajda sahw again, or should pray salat again? Do you think you can answer this? Jazakallah khayr
Alaikumassalam wa rahmatullah,
According to the Mālikī and Shāfiʿī schools the sajda al-sahū is voluntary rather than obligatory, so whether you forget to do or not, or whether you make an error in it, the prayer is considered valid.
Imam al-Nawawī says that if you make three prostrations by mistake during sajda al-sahū, you do not need to repeat it. The Ḥanbalī scholar Muṣtafā al-Suyuṭī (d. 1827 CE) says that there is no need to do extra prostrations for any mistake made during sajda al-sahū. That is also the opinion of the Ḥanafī scholar al-Kāsānī (d. 1191 CE). Archived link to a fatwa that mentions these opinions.