How do we know Jesus fulfilled all righteousness?

The fulfillment of all righteousness by Jesus Christ is established through His life, death, and resurrection. He magnified the law and made it honorable (Isaiah 42:21). By His obedience, He satisfied the law’s requirements perfectly, fully completing the work assigned to Him by the Father. Romans 10:4 states, 'For Christ is the end of the law for righteousness to everyone who believes,' emphasizing that Jesus is not only the means of righteousness but is itself the embodiment of it. His declaration of 'It is finished' confirms that there is no need for additional sacrifices or efforts to gain righteousness.