Musnad Ahmad 1153:1959

'Abd al-Wahid al-Haddad narrated to us, al-Qasim ibn al-Fadl narrated to us, from Muhammad ibn 'Ali, that 'Aisha used to incur debt. It was said to her: "What compels you to incur debt when you have a way out of it?" She said: "I heard the Messenger of Allah, peace and blessings of Allah be upon him, say: 'There is no servant who incurs a debt, while he intends to pay it back, but that there is help from Allah with him.' So, I am seeking that help."