Mishkat al-Masabih
Mishkat al-Masabih 159
Arabic hadith text
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «بَدَأَ الْإِسْلَامُ غَرِيبًا وَسَيَعُودُ كَمَا بَدَأَ فَطُوبَى للغرباء» . رَوَاهُ مُسلم
Translation
Abu Hurayra reported that the Messenger of God said, ‘Islam began as something strange, and it will return as it began; so glad tidings to the strangers.’ Muslim transmitted it.