Deuteronomy 6:8

8 Tie them on your hand as a sign, put them at the front of a headband around your forehead,

Deuteronomy 6:8 Meaning and Commentary

Deuteronomy 6:8

And thou shalt bind them for a sign upon thine hand
As a man ties anything to his hand for a token, that he may remember somewhat he is desirous of; though the Jews understand this literally, of binding a scroll of parchment, with this section and others written in it, upon their left hand, as the Targum of Jonathan here interprets the hand:

and they shall be as frontlets between thine eyes;
and which the same Targum interprets of the Tephilim, or phylacteries, which the Jews wear upon their foreheads, and on their arms, and so Jarchi; of which (See Gill on Matthew 23:5).

Deuteronomy 6:8 In-Context

6 These words, which I am ordering you today, are to be on your heart;

7 and you are to teach them carefully to your children. You are to talk about them when you sit at home, when you are traveling on the road, when you lie down and when you get up.

8 Tie them on your hand as a sign, put them at the front of a headband around your forehead,

9 and write them on the door-frames of your house and on your gates.

10 "When ADONAI your God has brought you into the land he swore to your ancestors Avraham, Yitz'chak and Ya'akov that he would give you - cities great and prosperous, which you didn't build;