Answered by Shaykh Omar Subedar
Question:
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?
Answer:
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:
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To leave out a wājib practice in the prayer
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To alter a wājib practice’s position from its place
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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