כִּֽי־יְ֭הוָה יִהְיֶ֣ה בְכִסְלֶ֑ךָ וְשָׁמַ֖ר רַגְלְךָ֣ מִלָּֽכֶד׃
Car l’Éternel sera l’objet de ton espoir; il préservera ton pied des embûches.
Rashi on Proverbs
For the Lord shall be your trust Heb. בכסלך, in your trust. Another explanation: in the things concerning which you are a fool (כסיל). This I found in Yerushalmi.