Rebecca the "sceptre" image comes from GENESIS. Note that Clement doesn't quote the gospels anywhere at all. Not once. The fact that he quotes the Tanach and that later GT authors also (mis)quote the Tanach is not the same as him quoting the GT itself.

"Consistent with" is not the same as referencing is it?
And everything that Sarah tells you, listen to her voice. Genesis, 21:12