Ali (May Allah be pleased with him) reported: A slave who had made a contract with his master to pay for his freedom, came to me and said: "I am unable to fulfill my obligation, so help me." He said to him: "Shall I not teach you a supplication which the Messenger of Allah (ﷺ) taught me? It will surely prove so effective that if you have a debt as large as a huge mountain, Allah will surely pay it for you.
اللَّهُمَّ اكْفِنِي بِحَلالِكَ عَنْ حَرَامِكَ ، وَأَغْنِنِي بِفَضْلِكَ عَمَّنْ سِوَاكَ
Allaahummak-finee bi ḥalaalika ‛an ḥaraamika, wa aghninee bi faḍlika ‛amman siwaak
O Allah, make what is lawful enough for me, as opposed to what is unlawful, and spare me by Your grace of the need for others.
(Riyadh As Saliheen, At Tirmidhi, Book 17, Hadith 1486)