اَللَّهُمَّ اكْفِنِي بِحَلَالِكَ عَنْ حَرَامِكَ، وَأَغْنِنِي بِفَضْلِكَ عَمَّنْ سِوَاكَ
Transliteration
Allahummakfini bihalalika 'an haramika, wa aghnini bifadlika 'amman siwak
English meaning
O Allah, suffice me with what You have made lawful, away from what You have forbidden, and enrich me with Your bounty so that I do not need anyone besides You.
When is it recited?
When burdened by debt.
Its virtue
Ali used to teach this dua to those in debt.
Source
Tirmidhi, Da'awat 110