en_tn/pro/05/01.md

My son ... my wisdom ... my understanding

That is the son, wisdom, and understanding of the wise person who started teaching in chapter 1.

pay attention to my wisdom; listen carefully to my understanding

These two phrases express the same idea. (See: rc://en/ta/man/translate/figs-parallelism)

discretion

the quality of being careful with regard to one's actions and speech. See how you translated this in Proverbs 1:4.

your lips

AT: "you" (See: rc://en/ta/man/translate/figs-synecdoche)

may protect knowledge

AT: "will say the right thing"