اَللَّهُمَّ اكْفِنِيْ بِحَلَالِكَ عَنْ حَرَامِكَ وَأَغْنِنِي بِفَضْلِكَ عَمَّنْ سِوَاكَ

Allaahummak-finee bihalaalika 'an haraamika wa 'aghninee bifadhlika 'amman siwaak

O Allah, suffice me with what You have allowed instead of what You have forbidden, and make me independent of all others besides You. Ali (RA) narrated: That a Mukatib came to him and said: “Indeed I am not capable of my Kitabah so aid me.” He said: “Should I not teach you words that the Messenger of Allah (ﷺ) taught me? If you had a debt upon you similar to the mountain of Sir, Allah would fulfill it for you. He said: (The dua is mentioned above)

Reference: Hasan. Tirmidhi: 3563