Here is one of the most tender footnotes in all of Targum Pseudo-Jonathan. Aharon lifts his hand, the frogs swarm up. And the meturgeman pauses to explain why it is Aharon, not Moses, who struck the water for both the first and second plagues: because through them (the waters of the Nile) he had found safety the time that his mother laid him in the river (Targum on Exodus 8:2).
Moses will not strike the river that saved him. The same water that carried the baby's basket through the reeds, the same current that floated him past crocodiles and into the princess's arms (Exodus 2:3-5), cannot now be the target of his rod. Gratitude is a law. You do not smite the thing that sheltered you, even if it is only water and even if it is no longer your river.
The principle is startling in its reach. If Moses owes the river a thank-you, how much more do we owe the teachers, friends, and communities that carried us. The meturgeman is slipping an ethics lesson into the plague narrative. The man chosen to liberate Israel is chosen in part because he refuses to be ungrateful, even to an inanimate object.
The takeaway, in the language of the Rabbis: one does not throw a stone into the well from which one drank. If that is true for a well, it is true for every hand that ever held us up.