Philo Judaeus Quod Deterius Potiori Insidiari Soleat 6

Therefore, from what has here been said it is plain, that they make the halting-place of the irrational faculties, which are in them, in the plain. But Joseph is sent unto them because he is unable to bear the somewhat austere knowledge of his father; that he may learn, under gentler instructors, what is to be done and what will be advantageous; for he uses a doctrine woven together from divers foundations, very variegated and very artfully made, in reference to which the law-giver says, that he had "a robe of many colours made for him;" ¹ signifying by this that he is an interpreter of labyrinth-like learning, such as is hard to be explained;