This tradition (mentioned above) has also been transmitted by al-Zuhri through a different chain of narrators to the same effect. This version adds: Some of us recited the Tashahhud while they were standing. Abu Dawud said: Ibn-Zubair made two prostrations before giving the salutation in a similar way when he stood up at the end of two rak’ahs. This is the opinion of al-Zuhrl.
Hadith Referenceسنن ابي داود / أبواب تفريع استفتاح الصلاة / 1035
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (1224) صحيح مسلم (570)
Hadith Takhrij« انظر ما قبلہ، (تحفة الأشراف: 9154) (صحیح) »
Explanation & Benefits
Shaykh Umar Farooq Saeedi
1035. Commentary: In the case where the middle tashahhud is omitted, if one becomes aware of it during the prayer, then it is preferable that the two prostrations of forgetfulness (sujud as-sahw) be performed before the salutation (salam); otherwise, if one realizes after the salam, then they must be performed after the salam.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 1035