Can you mention the reference for this Hadith?
من أقال مسلما أقاله الله عثرته
Imam Abu Dawud (rahimahullah) has recorded this Hadith on the authority of Sayyiduna Abu Hurayrah (radiyallahu ‘anhu).
Sayyiduna Abu Hurayrah (radiyallahu ‘anhu) reported that Rasulullah (sallallahu ‘alayhi wa sallam) said: “Whomsoever cancels a sale with a Muslim [if he regrets purchasing], Allah will cancel his mistake [on the Day of Qiyamah].”
(Sunan Abi Dawud, Hadith: 3454. Refer: Badhlul Majhud, Hadith: 3460)
See other wordings of this Hadith here
And Allah Ta’ala Knows best.
Answered by: Moulana Suhail Motala
Approved by: Moulana Muhammad Abasoomar