كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 332
Narrated 'Imran bin Husain (RA):
The Prophet (ﷺ) led them [the Companions (RA)] in prayer and forgot (something). He then made two prostrations and then said the Tashahhud and uttered the Taslim (salutation). [Reported by Abu Dawud, and at-Tirmidhi who graded it Hasan (good), and al-Hakim who graded it Sahih (authentic)].
وَعَنْ عِمْرَانَ بْنِ حُصَيْنٍ ‏-رَضِيَ اَللَّهُ تَعَالَى عَنْهُ‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-صَلَّى بِهِمْ , فَسَهَا فَسَجَدَ سَجْدَتَيْنِ , ثُمَّ تَشَهَّدَ , ثُمَّ سَلَّمَ } رَوَاهُ أَبُو دَاوُدَ , وَاَلتِّرْمِذِيُّ وَحَسَّنَهُ , وَالْحَاكِمُ وَصَحَّحَهُ .‏ 1
Reference : Bulugh al-Maram 332
In-book reference : Book 2, Hadith 332
English translation : Book 2, Hadith 328
Hadith Text
Reference