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Abu Hurairah narrated that the Messenger of Allah (ﷺ) said: “Take on only as much as you can do of good deeds, for the best of deeds is that which is done consistently, even if it is little.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا الْعَبَّاسُ بْنُ عُثْمَانَ الدِّمَشْقِيُّ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ، حَدَّثَنَا ابْنُ لَهِيعَةَ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ الأَعْرَجُ، سَمِعْتُ أَبَا هُرَيْرَةَ، يَقُولُ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ : " اكْلَفُوا مِنَ الْعَمَلِ مَا تُطِيقُونَ فَإِنَّ خَيْرَ الْعَمَلِ أَدْوَمُهُ وَإِنْ قَلَّ " .
sunnah.com