اللَّهُمَّ اكْفِنِي بِحَلَالِكَ عَنْ حَرَامِكَ، وَأَغْنِنِي بِفَضْلِكَ عَمَّنْ سِوَاكَ
Allahummak-fini bi halalika 'an haramika, wa aghnini bi fadlika 'amman siwak
O Allah, suffice me with what is lawful against what is forbidden, and make me independent of all others by Your favor.
Recite when seeking halal sustenance
Ali (RA) taught this dua to a man in debt, and he was soon able to pay off his debt completely.