Exodus:13:9-10
kjv@Exodus:13:9 @ 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.
kjv@Exodus:13:10 @ Thou shalt therefore keep this ordinance in his season from year to year.