Deuteronomy 6:8

“And it will be as a sign to you on your hand and as a memorial between your eyes, that the law of Yahweh may be in your mouth; for with a strong hand Yahweh brought you out of Egypt.

“So it will be as a sign on your hand and as phylacteries between your eyes, for with a strong hand Yahweh brought us out of Egypt.”

“You shall therefore place these words of mine on your heart and on your soul; and you shall bind them as a sign on your hand, and they shall be as phylacteries between your eyes.

“Indeed, He loves the people; All Your holy ones are in Your hand, And they followed in Your steps; Everyone is bearing up Your words.

“For all His judgments were before me, And as for His statutes, I did not depart from them.

And they taught in Judah, having the book of the law of Yahweh with them; and they went throughout all the cities of Judah and taught among the people.

For He established a testimony in Jacob And set a law in Israel, Which He commanded our fathers That they should teach them to their children,

Do not let lovingkindness and truth forsake you; Bind them around your neck, Write them on the tablet of your heart.

Bind them on your fingers; Write them on the tablet of your heart.

“But they do all their deeds to be noticed by men; for they broaden their phylacteries and lengthen the tassels of their garments.