This anatomical term appears in Rehoboam's arrogant boast to Israel's northern tribes. The young king declares 'my little finger is thicker than my father's loins,' meaning his lightest burden will exceed Solomon's heaviest. The phrase uses the smallest, weakest part of one's body to dwarf the strongest part of another's, creating maximum contrast. The construct form with first-person suffix emphasizes personal possession. This became proverbial language for surpassing superiority, though Rehoboam's boast precipitated Israel's division.