Hadith #423 (Sahih al-Bukhari)
Book: Prayers (Salat)
Narrator(s): Abu al-Badah أبو البداح بن عاصم بن عدي
Grade: Sahih

Anas said, “The Prophet (ﷺ) prayed in the sheep fold.” Later on I heard him saying, “He prayed in the sheep folds before the construction of the, mosque.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-423/