Musnad Ahmad 1153:2108

'Abd al-Samad narrated to us, al-Qasim—meaning Ibn al-Fadl—narrated to us, Muhammad ibn 'Ali narrated to us, from 'Aishah, that she said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Whoever borrows from people a debt, while Allah knows from him that he is keen to repay it, there will be with him from Allah help and a guardian." So I seek that help.