And he said unto them, I beheld Satan as lightning fall from heaven.
Luke 10 alludes to Isaiah 14:12ff, so I don’t think his summation is as much of a stretch as some would make it. Jesus would not have spoken it in Greek even if it were written in Greek. He was speaking to a Hebrew audience and Hebrew was the language that He likely used or possibly Aramaic. When referring to Scripture, He likely used Hebrew (No NIV Translation given the sacredness of Jewish Scriptures).
http://www.hebrew4christians.com/Articles/Jesus_Hebrew/jesus_hebrew.html