Keep your promises/agreements; Honour your commitments; Respect others' commitments; Fulfill your obligations; Be honest in all dealings.

This hadith is about the importance of giving and keeping one's word. Umm Hani daughter of Abu Talib gave protection to a man from the polytheists, and when she came to the Prophet he confirmed that they would be kept safe. This shows us that it is important to keep our promises, even if we make them with non-Muslims, as this was done in accordance with Islamic teachings. It also teaches us that we should not break our promises or agreements once they have been made, as this is considered a form of dishonesty and betrayal which are not acceptable in Islam. Furthermore, it shows us that even if someone else has made a promise on our behalf, we should still honour it and ensure its fulfilment.