Deuteronomy 11:18

18 `And ye have placed these my words on your heart, and on your soul, and have bound them for a sign on your hand, and they have been for frontlets between your eyes;

Deuteronomy 11:18 Meaning and Commentary

Ver. 18-20. Therefore shall ye lay up these my words in your heart, and
in your soul
Treasure up the laws of God delivered to them in their minds, retain them in their memories, and cherish a cordial affection for them; which would be an antidote against apostasy, idolatry, and other sins, ( Psalms 119:11 )

and bind them for a sign upon your hand, that they may be as frontlets
between your eyes;
of this and the two following verses, (See Gill on Deuteronomy 6:7), (See Gill on Deuteronomy 6:8), (See Gill on Deuteronomy 6:9).

Deuteronomy 11:18 In-Context

16 `Take heed to yourselves, lest your heart be enticed, and ye have turned aside, and served other gods, and bowed yourselves to them,
17 and the anger of Jehovah hath burned against you, and He hath restrained the heavens, and there is no rain, and the ground doth not give her increase, and ye have perished hastily from off the good land which Jehovah is giving to you.
18 `And ye have placed these my words on your heart, and on your soul, and have bound them for a sign on your hand, and they have been for frontlets between your eyes;
19 and ye have taught them to your sons, by speaking of them in thy sitting in thy house, and in thy going in the way, and in thy lying down, and in thy rising up,
20 and hast written them on the side-posts of thy house, and on thy gates,
Young's Literal Translation is in the public domain.