Sayyiduna Abu Hurairah, may Allah be pleased with him, narrated that the Messenger of Allah, peace and blessings be upon him, said: Do you think that my face (in prayer) is towards the Qiblah? By Allah, neither your humility is hidden from me nor (when you are) in bowing, I keep seeing you from behind my back.
Hadith Referenceاللؤلؤ والمرجان / كتاب الصلاة / 245
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: كتاب الصلاة: 40 باب عظة الإمام بالناس في إتمام الصلاة وذكر القبلة»
Brief Explanation
Hafiz Ibn Hajar rahimahullah states that here, actual seeing is intended. And this is among the miracles of the Messenger of Allah sallallahu alayhi wa sallam, that he used to see the people standing behind his back as well. (Secret)