Targum Pseudo-Jonathan on Genesis 9:24 adds a detail that quietly reshapes the whole story. The biblical Hebrew simply says Noah awoke and knew what his younger son had done to him. The Aramaic slips a phrase in: Noach awoke from his wine, and knew, by the relation of a dream, what had been done to him by Cham his son, who was inferior in worth, on the account that he had not begotten a fourth son.
A dream. Noah did not find out from a servant or a witness. The Holy One revealed it to him in sleep. This is one of the earliest prophetic dreams in Torah, long before Jacob's ladder or Joseph's sheaves. The post-Flood world already operates on the logic that truth comes to the righteous in the night.
The Targum also makes an extra comment — that Cham, Noah's son who transgressed, was inferior in worth because he had not yet fathered a fourth son. The other brothers had done so; Cham had not. Pseudo-Jonathan reads Cham's act as the act of a man whose own line was thin, striking at his father's future rather than building his own.
The Maggid draws a bitter wisdom from this. Those who have not built their own blessing sometimes resent the blessings of others, especially parental ones. The takeaway: before you laugh at the shame of the generation that raised you, ask whether you have planted even one new vine of your own.