Solomon
Proverbs 7:3ESV·traditional attribution

bind them on your fingers; write them on the tablet of your heart.

Matthew Henry Presbyterian @wholebiblehenry

These verses are an introduction to his warning against fleshly lusts, much the same with that, Pro 6:20, etc., and ending (Pro 7:5) as that did (Pro 6:24), To keep thee from the strange woman; that is it he aims at; only there he had said, Keep thy father's commandment, here (which comes all to one), Keep my commandments, for he speaks to us as unto sons.

Commenting on Proverbs 7:1-5

John Gill Reformed Baptist @doctorgill

Bind them upon thy fingers,.... Let the above words and doctrines be as ready and familiar as if they were at the fingers' ends; or let them be always fresh in memory, as a piece of thread is tied about the fingers, to put in mind of anything to be done; or let them be as rings upon the fingers, both memorial and ornamental: or...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Bind . . . fingers--as inscriptions on rings.