85 The chapter begins with an introductory exhortation (1–4), followed by an admonition to be faithful to the Lord (5–12). Wisdom is commended as the most valuable possession (13–18), essential to creation (19–20), and the way to a long and safe life (21–26). There then follows a warning to avoid unneighborliness (27–30) and emulating the wicked (31–35).
1 Heb “my son” (likewise in vv. 11, 21).
2 The verb יִצֹּר (yitsor) is a Qal jussive and the noun לִבֶּךָ (libbekha, “your heart”) functions as the subject: “let your heart keep my commandments.”

In other versions

My son, do not forget my teaching,

but let your heart keep my commandments,

My son, do not forget my teaching,

but keep my commands in your heart,

My son, don’t forget my teaching,

but let your heart keep my commands;

My child, never forget the things I have taught you.

Store my commands in your heart.

My child, do not forget my instruction,

and may your heart guard my commands.

My son, forget not my law;

But let thine heart keep my commandments:

Public Domain

Proverbs 3:1