Mishkat al-Masabih 4 Prayer كتاب الصلاة 167

قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «صَلُّوا فِي مَرَابِضِ الْغَنَمِ وَلَا تُصَلُّوا فِي أَعْطَانِ الْإِبِلِ» . رَوَاهُ التِّرْمِذِيّ

Abu Huraira reported God’s Messenger as saying, “Pray in sheep-folds, but not where camels kneel to drink.” Tirmidhi transmitted it.