Silsilat al-Ahadith al-Sahihah

Saeed bin Abu Saeed narrates from a companion of the Messenger of Allah who heard from the Prophet (peace and blessings be upon him) that he said: "Beware! A loaned item (something taken temporarily) must be returned, a gift given for benefit (for a certain period) must also be returned, a debt must be repaid, and the guarantor of a thing is responsible for its payment."