كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 349
Narrated 'Abdur-Rahman bin 'Auf (RA):
The Prophet (ﷺ) prostrated and prolonged the Sajda, he then raised his head and said, "Jibrael (Gabriel) had come and given me glad tidings, thereafter I prostrated in gratitude to Allah." [Ahmad reported it and al-Hakim graded it Sahih (authentic)].
وَعَنْ عَبْدِ اَلرَّحْمَنِ بْنِ عَوْفٍ ‏- رضى الله عنه ‏- قَالَ : { سَجَدَ اَلنَّبِيُّ ‏- صلى الله عليه وسلم ‏-فَأَطَالَ اَلسُّجُودَ , ثُمَّ رَفَعَ رَأْسَهُ وَقَالَ : " إِنَّ جِبْرِيلَ آتَانِي , فَبَشَّرَنِي , فَسَجَدْت لِلَّهِ شُكْرًا" } رَوَاهُ أَحْمَدُ , وَصَحَّحَهُ اَلْحَاكِمُ .‏ 1
Reference : Bulugh al-Maram 349
In-book reference : Book 2, Hadith 349
English translation : Book 2, Hadith 344
Hadith Text
Reference