(Devarim, Ibid.) "across the Jordan": We are hereby taught that he rebuked them for what they did across the Jordan.
"in the desert": We are hereby taught that he rebuked them for what they did in the desert. They took their small sons and daughters and threw them into Moses' lap and said to him? What provisions did you make for these? What livelihood did you provide for them? R. Yehudah says: This ("in the desert") refers to (Shemoth 16:3) "And the children of Israel said to them (Moses and Aaron): Would that we had died by the hand of the L-rd in the land of Egypt!"