Sahih al-Bukhari 234
Book 4: Ablutions (Wudu') · Narrated by Anas
Arabic
حَدَّثَنَا آدَمُ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنَا أَبُو التَّيَّاحِ، يَزِيدُ بْنُ حُمَيْدٍ عَنْ أَنَسٍ، قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يُصَلِّي قَبْلَ أَنْ يُبْنَى الْمَسْجِدُ فِي مَرَابِضِ الْغَنَمِ.
English translation
Narrated Anas:Prior to the construction of the mosque, the Prophet (ﷺ) offered the prayers at sheep-folds
Reference: Sahih al-Bukhari 234, Book of Ablutions (Wudu'). English translation by Dr. Muhammad Muhsin Khan.