I remember this example right off the top of my head. It's just one of numerous examples of when Yahshua and his disciples quoted scripture that didn't bear the seal of approval from Josephus:
(CLV) Ju 1:14
Now Enoch, the seventh from Adam, prophesies to these also, saying, "Lo! the Lord came among ten thousand of His saints,
(CLV) Ju 1:15
to do judging against all, and to expose all the irreverent concerning all their irreverent acts in which they are irreverent, and concerning all the hard words which irreverent sinners speak against Him."
Enoch 2:1-2 Behold, he comes with ten thousands of his saints, to execute judgment upon them, and destroy the wicked, and reprove all the carnal for everything which the sinful and ungodly have done, and committed against him.
Should we toss out the book of Jude; because he was quoting scripture outside of the scriptures accepted by the imposters?