Kohelet Rabbah 2:21 קהלת רבה ב׳:כ״א

“For there is a man whose toil is with wisdom, and with knowledge, and with skill; yet to a man who has not toiled in it, he will leave it as his portion. This too is vanity and a great evil” (Ecclesiastes 2:21).
“For there is a man whose toil is with wisdom…” – Rabbi Yudan ben Rabbi Simon said: Great is the ability of prophets who liken the created to its Creator.⁶⁷The intent is the reverse; they portray God by means of human attributes. That is what is written: “I heard the voice of a man from the midst of the Ulai.” (Daniel 8:16). And Rabbi Yudan ben Rabbi Simon said: There is another verse that is clearer than that one: “And on the image of the throne, the image of a person” (Ezekiel 1:26). “With wisdom,”⁶⁸The midrash proceeds to cite attributes from the verse in Ecclesiastes and compare them to other verses where these attributes are attributed to God. – “the Lord founded the earth with wisdom” (Proverbs 3:19); “with knowledge” – “by His knowledge the depths were breached” (Proverbs 3:20). “And with skill” – Rabbi Berekhya [said] in the name of Rabbi Yehuda bar Rabbi Simon: Not with toil and not with exertion did the Holy One blessed be He create His world, as it is written: “With the word of God the heavens were made” (Psalms 33:6). “Yet to a man who has not toiled in it, he will leave it as his portion” – this is the generation of Enosh and the generation of the Flood. “This too is vanity and a great evil,” as it is written: “The Lord saw that the wickedness of man was great on the earth…” (Genesis 6:5).