How should a masbuq-lahiq perform sajda al-sahw?
Question
If a masbuq becomes a lahiq because his wudu’ is broken, and at that time the imam performs sajda al-sahw, and then, while the lahiq is performing the missed rak‘a after the imam, something also happens to him that makes sajda al-sahw binding — should this person perform sajda al-sahw twice, or will one do? Will [one] suffice him?
Answer
In the situation asked about, this masbuq-lahiq should perform sajda al-sahw only once. In “al-Durr al-Mukhtar” on the margin of “Radd al-Muhtar”: [ar]والمسبوق يسجد مع إمامه مطلقًا (إلى قوله) ثم يقضي ما فاته، ولو سها فيه سجد ثانيًا[/ar] “The masbuq prostrates with his imam in every case (up to his words:)
Source: Fatawa Mahmudiyya
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