Pope Shenouda III
We see that the Lord Jesus Christ had authority to legislate. Regarding the Sabbath: it is lawful to do good on it. Regarding the tithes: they are the least of the offerings and are to be observed with the commandment: "Give to him who asks you" (Matt. 5:42). He also had authority to legislate monogamy, divorce (Matt. 5:32) and all the other laws in Christianity pertaining to perfection.