Adam Holds Priesthood

Encyclopedia of Mormonism pg. 16; As the first on this earth to receive priesthood keys, Adam continues to dispense authority to others and to watch over priesthood administration on the earth; those to whom keys have been given must return them or account for them to Adam…

Hebrews 7:5; And verily they that are of the sons of Levi, who receive the office of the priesthood, have a commandment to take tithes of the people according to the law, that is, of their brethren, though they come out of the loins of Abraham.

Where in the Bible does it say that Adam received the priesthood or that anyone who holds the priesthood must answer to Adam?  The first time we see any mention of priesthood is found in Exodus 28:1.