Musnad Ahmad 1153:426

Musa narrated to us, Al-Qasim—meaning Ibn al-Fadl—narrated to us, Muhammad ibn Ali narrated to us, he said: Aisha was in debt, so it was said to her: "What is the matter with you and debt?" She said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'There is no servant who has the intention of paying off his debt, except that he has help from Allah, the Almighty and Majestic.' So, I am seeking that help."