Answered by Shaykh Omar Subedar
I am a bit confused regarding Sajda Al-Sahw (Prostration for a mistake in ritual prayer). I would be grateful if you could explain the correct way of observing it. Does Sajda Al-Sahw only apply to wājibāt (obligatory matters) missed during prayers or for other things also?
بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ
Abū Bakr ibn Mas’ōd Al Kāsānī [d. 587H] has written in Badāiʾ Al Ṣanāiʾ, “The causes of Sajda Al-Sahw becoming mandatory are:
To leave out a wājib practice in the prayer
To alter a wājib practice’s position from its place
To alter a farḍ practice’s position from its place unintentionally
This is because all these factors cause deficiency in the prayer and hence amending it is required through sujūd.” [Badāiʾ Al Ṣanāiʾ p.691 vol.1, Abū Bakr ibn Mas’ōd Al Kāsāni, Dār Al Kotob Al Ilmīyah, Beirut Lebanon 1997]
And Allāh Knows Best
This answer was collected from Mathabah.org. It’s an Islamic educational institute based in Canada. The questions are generally answered by Sheikh Yusuf Badat and Sheikh Omar Subedar.