Charles Ellicott Commentary Proverbs 7:3

"Bind them upon thy fingers; Write them upon the tablet of thy heart." — Proverbs 7:3 (ASV)

(m). Thirteenth Discourse: — Also Against Adultery (Proverbs 7:0).

Bind them upon your fingers.—See above on Proverbs 3:3. The thong of the phylactery or fillet for the left arm was wound seven times around it, and as many times around the middle finger.