This was the rod Aaron had when God proved to the people of Israel that he had chosen Aaron as his priest by making Aaron's rod bud. (See: [[rc://en/ta/man/translate/figs-explicit]])
When the Israelites were making the ark of the covenant, God commanded them to carve two cherubim facing each other, with their wings touching, over the atonement lid of the ark of the covenant. Here they are spoken of as providing shade for the ark of the covenant. AT: "glorious cherubim covered the atonement lid with their wings"
Even though the author uses the plural pronoun "we," he is most likely referring only to himself. AT: "which I cannot" (See: [[rc://en/ta/man/translate/figs-pronouns]])