Танах к Кохелет 1:1

Vanity of vanities, said the Koheleth, all is vanity [viz. 1:1-2].

And more [than is written in this book,] Koheleth was wise, and he taught knowledge to the people, ve'izen [lit., "and he made ears." (In the beginning, the Torah was like a basket without ears (i.e., handles), and he came and affixed "ears" to it, e.g.: eruvin (boundary limitations) as a fence for the keeping of the Sabbath; washing of the hands as a fence for purity; banning of secondary relations as a fence against illicit relations.)]

Koheleth sought to find [and found] things of desire [("laws to Moses on Sinai") and righteous writ [(the Written Torah and the Prophets)].