It is narrated from Hazrat Nu'man (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The example of the one who strives in the path of Allah is like that person who fasts during the day and stands in prayer at night, "as long as he does not return, whenever he may return."
Hadith Referenceمسند احمد / أول مسند الكوفيين / 18401
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد اختلف فى رفعه وقفه على سماك، والصحيح وقفه