Al-Awza’i reported: Hassan ibn ‘Atiyah, may Allah have mercy on him, said, “Verily, people will be in prayer as one, yet the difference between them is like that between the heavens and earth. A man may be reverent and facing forward in his prayer, yet another is unmindful and neglectful.”
Source: Ḥilyat al-Awliyā’ 7945
عن الأوزاعي عَنْ حَسَّان بن عَطِيَّة رحمه الله قَالَ إِنَّ الْقَوْمَ لَيَكُونُونَ فِي الصَّلاةِ الْوَاحِدَةِ وَإِنَّ بَيْنَهُمْ كَمَا بَيْنَ السَّمَاءِ وَالأَرْضِ أَنَّ الرَّجُلَ يَكُونُ خَاشِعًا مُقْبِلا عَلَى صَلاتِهِ وَالآخَرُ سَاهِيًا غَافِلا
7945 حلية الأولياء لأبي نعيم