ENOfficial
It was narrated from Abu Hurairah that the Messenger of Allah (ﷺ) said: “There are people who fast and get nothing from their fast except hunger, and there are those who pray and get nothing from their prayer but a sleepless night.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا عَمْرُو بْنُ رَافِعٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ الْمُبَارَكِ، عَنْ أُسَامَةَ بْنِ زَيْدٍ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ، قَالَ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " رُبَّ صَائِمٍ لَيْسَ لَهُ مِنْ صِيَامِهِ إِلاَّ الْجُوعُ. وَرُبَّ قَائِمٍ لَيْسَ لَهُ مِنْ قِيَامِهِ إِلاَّ السَّهَرُ " .
sunnah.com