كتاب الصيام
13  
The Book of Fasting
(11)
Chapter: The prohibition of Al-Wisal
(11)
باب النَّهْىِ عَنِ الْوِصَالِ، فِي الصَّوْمِ ‏‏
Sahih Muslim 1103 c

Abu Huraira (Allah be pleased with him) reported Allah's Apostle (ﷺ) as saying (the words as said in the previous hadith) but with this alteration (of words):

" Take upon yourselves (the burden of the deeds) for which you have the strength to bear."
وَحَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا الْمُغِيرَةُ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي، هُرَيْرَةَ - رضى الله عنه - عَنِ النَّبِيِّ صلى الله عليه وسلم بِمِثْلِهِ غَيْرَ أَنَّهُ قَالَ ‏ "‏ فَاكْلَفُوا مَا لَكُمْ بِهِ طَاقَةٌ ‏"‏ ‏.‏
Reference : Sahih Muslim 1103c
In-book reference : Book 13, Hadith 74
USC-MSA web (English) reference : Book 6, Hadith 2431
  (deprecated numbering scheme)