Most of those credited to him are found in the Book of Proverbs, in the following parts: 1:1-9:18,10:1-22:16 , and his authorship is specifically mentioned in the first chapter: " The parables of Solomon, the son of David, king of Israel."(New Revised Standard Version Bible, Proverbs 1:1)
But it was not Solomon alone that is thought to have written the entire book. Mention of other authors includes the Wise men, who had perhaps attended to baby Jesus, for the portions 22:17-24:22 and 24:23-34, Agur son of Jakeh, an unknown entity, for chapter 30 and King Lemuel, a non-Israelite, for 31:1-9 and perhaps 31:10-31.
Non-catholic scholars, however, believe that the headings of these portions ascribing them to different authors are not reliable because the general tone of the content and indicates a late post-exilic date.There is no admonishment against idolatry, monogamy is always presumed, there is no specific mention of Israel, there is a definite relationship to the Ecclesiasticus which should be within two centuries of the Book of Proverbs, and lastly, wisdom is personified, which coincides with later Jewish metaphysics.Accordi ...