What is "Kol ha'Davar" that Hashem commanded Yehoshua?
Rashi (from Sotah 34a): Yehoshua told the people that they cross in order to dispossess all the residents of the land.
Radak: It is putting rocks in the Yarden, and taking other rocks to the Malon.
Malbim: It is the entire Parshah starting in Devarim (31:14), from "Kra Es Yehoshua
What did Moshe command Yehoshua?
Radak: "Ba'Yom Asher Ta'avru... va'Hakemosa Lecha Avanim
What did they rush?
Radak: They were quick to set up the rocks, and afterwards they passed through.