For frontlets between thine eyes As conspicuous as any thing fixed to thy forehead, or between thine eyes. That is, they were constantly to retain such a sense of their deliverance as if they had it before their eyes.
Related Commentaries of Exodus 13:16
Exodus 13:16
16 And it shall be for a token upon thine hand, and for frontlets between thine eyes: for by strength of hand the LORD brought us forth out of Egypt.