Why does the Book of Enoch support the Book of Moses claim that Enoch was given the right to God’s throne?

Moses 7:59 reads

And Enoch beheld the Son of Man ascend up unto the Father; and he called unto the Lord, saying: Wilt thou not come again upon the earth? Forasmuch as thou art God, and I know thee, and thou hast sworn unto me, and commanded me that I should ask in the name of thine Only Begotten; thou hast made me, and given unto me a right to thy throne, and not of myself, but through thine own grace; wherefore, I ask thee if thou wilt not come again on the earth. (emphasis added)

This parallels the language in 3 Enoch 10:1-3 (found long after the publication of the Book of Moses)

The Holy One made for me a throne like the throne of glory . . . He placed it at the door of the seventh palace and sat me down upon it. (emphasis added)

Where would Joseph Smith have found this information on Enoch?

See:

Jeffrey M. Bradshaw – KnoWhy OTL05C — Could Joseph Smith Have Drawn On Ancient Manuscripts When He Translated the Story of Enoch?
Strong Reasons – The Book of Enoch and the Book of Moses

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