Milah Forty Years Later: The Day We Really Left Mitzrayim
Yehoshua's father Nun, was the son of Elishama ben Amihud the Nasi of Ephraim. Yehoshua began propesizing right after the mourning period for Moshe.
The Haftarah mentions discusses the mass circumcision and the first Korban Pesach offered in Eretz Yisrael. After milah Hashem tells Yehoshua that today Hashem removed the disgrace of Egypt from them - it showed that what the Chartumim predicted wasn't death in the Midbar but the circumcision.
Shiur provided courtesy of Torah Anytime