عن جابر بن عبد الله رضي الله عنهما أن رسول الله صلى الله عليه وسلم قال: رحم الله رجلا سمحا إذا باع وإذا اشترى وإذا اقتضى (صحيح البخاري رقم 2076)

Hazrat Jaabir bin ‘Abdillah (radhiyallahu ‘anhu) reports that Rasulullah (sallallahu ‘alaihi wasallam) once made the following du‘aa, “May Allah have mercy on the person who is lenient (and considerate) when he sells, purchases and when he claims money owed to him (i.e. in his business dealings, he is not harsh and inconsiderate, rather he is polite and considerate when his debtor is unable to fulfill the debt).”