This book of the law shall not depart out of your mouth, but you shall meditate thereon day and night, that you may observe to do according to all that is written therein: for then you shall make your way prosperous, and then you shall have good success.
JEREMIAH: "The resemblances between Jeremiah and Deuteronomy are marked.  There are words used in both that are found nowhere else.  Passages in one are identical with or closely similar to passages in the other, and in general tone and form of thought, the two remarkably resemble each other.[12] Could there be any doubt that Jeremiah knew the Pentateuch almost by heart?