אִם־שַׂ֣מְתִּי זָהָ֣ב כִּסְלִ֑י וְ֝לַכֶּ֗תֶם אָמַ֥רְתִּי מִבְטַחִֽי׃
If I have made gold my hope, And have said to the fine gold: ‘Thou art my confidence’;
Rashi on Job
my hope Heb. כסלי, like (8:14), “whose confidence (כסלו) shall be cut off.” My hope and my thought, and because the kidneys are on the flanks (כסלים), and the kidneys advise, the thought is called כֶּסֶל.