Chabad.org — English translation + Rashi
Torah Temimah: “קומה ה׳ ויפוצו אויביך” — Moshe’s prayer when the Aron moves is a request that enemies scatter before Hashem.
English: “Rise up, Hashem, and let Your enemies be scattered, and let those who hate You flee from before You.”
Prayer at departure — movement of the Aron is accompanied by a plea for Divine protection.
The camp does not march in silence; Moshe gives voice to the fear of enemies and the hope of their flight.