Exodus
King James Version (KJV)

“And it shall be for a sign unto thee upon thine hand, and for a memorial between thine eyes, that the LORD'S law may be in thy mouth: for with a strong hand hath the LORD brought thee out of Egypt.”
King James Version (KJV)
13:9 Upon thy hand, between thine eyes - Proverbial expressions; denoting things which are never out of our thoughts.