كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 350
Narrated Al-Bara' bin 'Azib (RA):
The Prophet (ﷺ) sent 'Ali to Yemen. The narrator mentioned the complete Hadith. He said, "Ali sent a letter regarding their (the people of Yemen) acceptance of Islam. When Allah's Messenger (ﷺ) read the letter, he prostrated in gratitude to Allah the Most High for that." [Reported by al-Baihaqi].
وَعَنْ اَلْبَرَاءِ بْنِ عَازِبٍ ‏-رَضِيَ اَللَّهُ عَنْهُمَا‏- { أَنَّ اَلنَّبِيَّ ‏- صلى الله عليه وسلم ‏-بَعَثَ عَلِيًّا إِلَى اَلْيَمَنِ ‏- فَذَكَرَ اَلْحَدِيثَ ‏- قَالَ : فَكَتَبَ عَلِيٌّ ‏- رضى الله عنه ‏- بِإِسْلَامِهِمْ , فَلَمَّا قَرَأَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-اَلْكِتَابَ خَرَّ سَاجِدًا } رَوَاهُ اَلْبَيْهَقِيُّ .‏ 1
Reference : Bulugh al-Maram 350
In-book reference : Book 2, Hadith 350
English translation : Book 2, Hadith 345
Bulugh al-Maram 350
And its basic meaning is found in Sahih al-Bukhari.
وَأَصْلُهُ فِي اَلْبُخَارِيِّ .‏ 1
Reference : Bulugh al-Maram 350
In-book reference : Book 2, Hadith 350
Hadith Text
Reference