Deuteronomy 6:7-9

Amplified Bible

⁷You shall teach them diligently to your ^[a]children [impressing God’s precepts on their minds and penetrating their hearts with His truths] and shall speak of them when you sit in your house and when you walk on the road and when you lie down and when you get up. ⁸And you shall bind them as a sign on your hand (forearm), and they shall be used as ^[b]bands (frontals, frontlets) on your forehead. ⁹You shall write them on the ^[c]doorposts of your house and on your gates.

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Footnotes

Deuteronomy 6:7 Lit sons.
Deuteronomy 6:8 Or phylacteries. This is originally a Greek word meaning “safeguard.” In Jewish tradition these are also called tefillin, and are understood to be small leather boxes tied to the forearm and to the top of the head with leather straps. The boxes contain small parchment copies of the passage found here and three others.
Deuteronomy 6:9 Heb mezuzoth, which—like tefillin (v 8)—also have special significance in Jewish tradition. The (singular) mezuzah is a piece of parchment on which is written this passage (6:4-9) and 11:13-21. The parchment is encased to protect it, and is attached to the right doorpost. By Jewish law, all rooms where people live or sleep (excluding bathrooms) are required to have mezuzoth on the doorposts.