Kitāb al-Muʾmin
Hadith 136136- وعن أبي جعفر عليه السلام قال: من مشى في حاجة لأخيه المسلم حتى يتمها أثبت الله قدميه يوم تزل الأقدام
136. It has been reported that Abu Ja'far (a.s) said: One who goes a distance to help his Muslim brother until he completes it, Allah will steady his feet on the Day when feet shall waver and slip.