Narrated Thawban: The Prophet ﷺ said: For each forgetfulness there are two prostrations after giving the salutation. No one except Amr (ibn Uthman) mentioned the words "from his father" (in the chain Abdur Rahman ibn Jubayr ibn Nufayr from Thawban).
Related hadith on this topic
Explanation & Benefits
Maulana Ataullah Sajid
Benefits and Issues:
➊ The meaning of every forgetfulness is that the mistake, whether it is of omission or addition, can be rectified by two prostrations of forgetfulness (sujud as-sahw).
➋ If it becomes certain that fewer units (rak‘ahs) of the prayer have been performed, then the missed rak‘ah should be performed and then the prostration of forgetfulness (sujud as-sahw) should be done, as has been explained in previous chapters.
➌ The prostrations of forgetfulness (sujud as-sahw) can be performed before the salutation (salam) as well as after it. The meaning of the hadith under study is not that sujud as-sahw cannot be done before the salam, but rather that in every case of forgetfulness, it is also correct to perform the prostrations after the salam.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 1219