Son of Man:
I don’t have a chumash with me now, but it’s at the beginning of Sefer Devarim. I think it’s where the Torah says “Me’ever HaYarden”, but I’m not certain. Ibn Ezra refers to the “Sod Ha Yud Bes”, the secret of the 12. The 12 is a reference to 12 Pesukim in the Torah which, according to Ibn Ezra, were not written by Moshe Rabbenu.