Forgetting the Additional Takbirs in the Eid al-Adha Prayer
Question
If the additional takbirs were forgotten in the Eid al-Adha prayer and sajda al-sahw (the prostration of forgetfulness) was not performed, will the prayer be valid or not?
Answer
If the gathering is large and sajda al-sahw would cause confusion, so that there is a danger of the prayer being spoiled, then sajda al-sahw lapses.
Source: Fatawa Mahmudiyya
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