Q: “What is the criterion for this forgetting (due to which we must perform the two prostrations of forgetfulness)? Is it any forgetting in prayer even if he, for example, adds something, omits something…?”
Shaikh al-Albaani: “Anything, if one forgets.”
Q: “Even if it is a sunnah?”
Shaikh al-Albaani: “Even if it is a sunnah.”
* * *