The Prophet (peace and blessings of Allah be upon him) did not say anything from himself. Everything he said was a message of Allah. Accept what Muhammad (S:) gives you and give up what he forbids .
The outcome of all work depends on intention. You write it down. I swear by the entity in whose hand my soul is. Nothing but truth has come out of this mouth .

All the hadiths mentioned in Sunan An-Nasa'i are true