Proverbs attaches itself to Solomon more explicitly than any other biblical book, opening three separate sections with his name and drawing on his reputation, established in Kings, as the wisest king Israel ever had, whose wisdom God granted directly in answer to prayer. The book's own internal attributions complicate any simple single-authorship reading, since it names Agur and King Lemuel as additional sources and refers generally to sayings "of the wise" gathered by later scribes, "the men of Hezekiah king of Judah copied" one whole section, per 25:1, an explicit note that at least part of the collection was assembled generations after Solomon by royal scribal effort.
Scholars have long noted close structural and thematic parallels between sections of Proverbs and earlier Egyptian wisdom literature, particularly the Instruction of Amenemope, evidence that Israel's wisdom tradition drew on and adapted a wider ancient Near Eastern genre of practical moral instruction rather than developing in total isolation.
Jewish tradition eventually placed Proverbs, Ecclesiastes and Song of Songs together as three works attributed to Solomon at different stages of life, composed respectively, per a rabbinic reading, in his youthful passion, his mature wisdom, and his aged disillusionment, a traditional literary frame rather than a historical claim critical scholarship accepts.