It’s taken from Genesis 49:26
Douay-Rheims Bible
The blessings of thy father are strengthened with the blessings of his fathers: until the desire of the everlasting hills should come; may they be upon the head of Joseph, and upon the crown of the Nazarite among his brethren.
Thanks. I would have known that had I read Cahill’s work for I am sure he referenced it, but that is one of his series that I have as yet not opened.