In one report the words are: "Whoever has a debt binding upon him and intends to repay it" (the narrator is in doubt; perhaps the words are:) "strives to repay it, a guard from Allah Almighty remains with him continually." All of these reports were recorded by Imam Ahmad and by Imam al-Tabarani in al-Mu'jam al-Awsat. Sayyidah Aishah (may Allah be pleased with her) says: So I love that a guard from Allah Almighty should remain with me continually. The full incident is narrated in this report.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البيوع / 6660