Anas bin Malik reported,

The Messenger of Allah ﷺ was on a journey. Some of the people fasted and others did not. Those who did not fast tightened their belts and got to work, while those who were fasting were too weak to do some of the work.He said about this, "Those who did not fast have taken the reward today."

Muslim 2623

Sahih

و حدثنا أبو كريب حدثنا حفص عن عاصم الأحول عن مورق

عن أنس رضي الله عنه قال

كان رسول الله ﷺ في سفر فصام بعض وأفطر بعض فتحزم المفطرون وعملوا وضعف الصوام عن بعض العمل قال فقال في ذلك ذهب المفطرون اليوم بالأجر

مسلم 2623صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Fasting
Chapter
Reward of the one who breaks his fast while traveling if he undertakes the work
Numbering
Darussalam 2623
Muslim 2623