Albert Barnes Commentary Proverbs 31:4

"It is not for kings, O Lemuel, it is not for kings to drink wine; Nor for princes [to say], Where is strong drink?" — Proverbs 31:4 (ASV)

Some read: "nor for princes to say, Where is strong drink?" The "strong drink" (Proverbs 20:1) was distilled from barley, or honey, or dates.