Deuteronomy 32:46
“And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.”
And Moses came and spake all the words of this song in the ears of the people, he, and Hoshea the son of Nun.
And Moses made an end of speaking all these words to all Israel:
And he said unto them, Set your hearts unto all the words which I testify among you this day, which ye shall command your children to observe to do, all the words of this law.
For it is not a vain thing for you; because it is your life: and through this thing ye shall prolong your days in the land, whither ye go over Jordan to possess it.
And the Lord spake unto Moses that selfsame day, saying,
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Only take heed to thyself, and keep thy soul diligently, lest thou forget the things which thine eyes have seen, and lest they depart from thy heart all the days of thy life: but teach them thy sons, and thy sons’ sons;”
“For I know him, that he will command his children and his household after him, and they shall keep the way of the Lord, to do justice and judgment; that the Lord may bring upon Abraham that which he hath spoken of him.”
“And these words, which I command thee this day, shall be in thine heart:”
“My son, let not them depart from thine eyes: keep sound wisdom and discretion:”
“Therefore shall ye lay up these my words in your heart and in your soul, and bind them for a sign upon your hand, that they may be as frontlets between your eyes.”