Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
ibnmajah:3823Abū Bakr b. Abū Shaybah > Abū Muʿāwiyah And Wakīʿ > al-Aʿmash > Abū Ṣāliḥ > Abū Hurayrah

of Allah (saas) said: "Every deed of the son of Adam will be multiplied for him, between ten and seven hundred times for each merit. Allah said: 'Except for fasting, for it is for Me and I shall reward for it.'" (sahih)  

ابن ماجة:٣٨٢٣حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا أَبُو مُعَاوِيَةَ وَوَكِيعٌ عَنِ الأَعْمَشِ عَنْ أَبِي صَالِحٍ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ كُلُّ عَمَلِ ابْنِ آدَمَ يُضَاعَفُ لَهُ الْحَسَنَةُ بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِمِائَةِ ضِعْفٍ قَالَ اللَّهُ سُبْحَانَهُ إِلاَّ الصَّوْمَ فَإِنَّهُ لِي وَأَنَا أَجْزِي بِهِ  


See similar narrations below:

Collected by Aḥmad
ahmad:7494Qāl

[Machine] And the Messenger of Allah ﷺ said: Allah ﷻ says, "Every action of the son of Adam is for him except fasting, for it is for Me and I shall reward for it. Fasting is a shield. When any one of you is observing fast, he should neither indulge in obscene language nor should he raise his voice; and if anyone reviles him or tries to quarrel with him, he should say: 'I am fasting.'" By Him, in Whose Hand is the soul of Muhammad, the breath of one observing Saum is sweeter to Allah than the fragrance of musk. The one who fasts two days willingly for the sake of Allah, Allah will keep him away from the fire of Hell.  

أحمد:٧٤٩٤

وَقَالَ قَالَ رَسُولُ اللهِ ﷺ يَقُولُ اللهُ ﷻ كُلُّ عَمَلِ ابْنِ آدَمَ لَهُ إِلَّا الصِّيَامَ فَهُوَ لِي وَأَنَا أَجْزِي بِهِ إِنَّمَا يَتْرُكُ طَعَامَهُ وَشَرَابَهُ مِنْ أَجْلِي فَصِيَامُهُ لِي وَأَنَا أَجْزِي بِهِ كُلُّ حَسَنَةٍ بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِ مِائَةِ ضِعْفٍ إِلَّا الصِّيَامَ فَهُوَ لِي وَأَنَا أَجْزِي بِهِ  

ahmad:10540Yazīd > Muḥammad > Abū Salamah > Abū Hurayrah

[Machine] The Messenger of Allah ﷺ said, "Allah said, 'Every action of the son of Adam is for him, except fasting. It is for Me and I shall reward for it. He leaves his food, drink, and desires for My sake. Fasting is for Me and I shall reward for it accordingly.'"  

أحمد:١٠٥٤٠حَدَّثَنَا يَزِيدُ أَخْبَرَنَا مُحَمَّدٌ عَنْ أَبِي سَلَمَةَ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللهِ ﷺ قَالَ اللهُ ﷻ كُلُّ عَمَلِ ابْنِ آدَمَ لَهُ فَالْحَسَنَةُ بِعَشْرِ أَمْثَالِهَا إِلَى سَبْعِ مِائَةِ ضِعْفٍإِلَّا الصِّيَامَ هُوَ لِي وَأَنَا أَجْزِي بِهِ يَتْرُكُ الطَّعَامَ لِشَهْوَتِهِ مِنْ أَجْلِى وَيَتْرُكُ الشَّرَابَ لِشَهْوَتِهِ مِنْ أَجْلِى هُوَ لِى وَأَنَا أَجْزِى بِهِ