וַיִּשְׁמַ֣ע מֹשֶׁ֔ה וַיִּפֹּ֖ל עַל־פָּנָֽיו׃
And when Moses heard it, he fell upon his face.
Targum Jonathan on Numbers
And Mosheh heard, as if every one of them was jealous of his wife, and would have them drink of the trial-water on account of Mosheh; and he fell on his face for shame.