The Book of the Believer · Hadith 179 (#Ḥadīth #9)
Chapter 8 | What Allah (azwj) has Forbidden a Believer to do Against a Fellow Believer
179 - وعن أبي عبد الله عليه السلام قال: أيما مؤمن سأل أخاه المؤمن حاجة، وهو يقدر على قضائها، فرده بها، سلط الله عليه شجاعا في قبره ينهش أصابعه.
179. It has been reported that Abu 'Abd Allah said: If any believer asks a fellow believer for help but the other refuses though he is able to do, Allah will impose a serpent in his grave biting his fingers.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).