Moses
Deuteronomy 6:7BSB·traditional attribution

And you shall teach them diligently to your children and speak of them when you sit at home and when you walk along the road, when you lie down and when you get up.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. A brief summary of religion, containing the first principles of faith and obedience, Deu 6:4, Deu 6:5. These two verses the Jews reckon one of the choicest portions of scripture: they write it in their phylacteries, and think themselves not only obliged to say it at least twice every day, but very happy in being so obliged, having this saying among them...

Commenting on Deuteronomy 6:4-16

John Gill Reformed Baptist @doctorgill

And thou shall teach them diligently unto thy children,.... Care and diligence are to be used, and pains taken, to instruct children, as soon as they are capable, in the knowledge of God, and of his commandments; that they are to love him, fear him, serve, and worship him; this is to bring them up in the nurture and admonition of the Lord, Eph 6:4...

Geneva Bible Notes Reformed @genevanotes

And thou shalt teach them diligently to thy children, and shalt talk of them when thou sittest in thy house, and when thou walkest by the way, and when thou liest down, and when thou risest up. {teach: Heb. whet, or, sharpen} (c) Some read, "You shall whet them upon your children": that is, that they may imprint them more deeply in their memory.