Deuteronomy 23:10

Camp of the Levites, according to the Rabbins. (Calmet) --- Bonfrere explains this of priests. (Menochius) --- But it rather refers to all who dwelt in the camp, where the ark seems to have been generally present, along with the armies, ver. 14., and Numbers xxxi. 6. (Calmet) --- It is not clear, however, that the law alludes to any other camp, but that in the midst of which the tabernacle was fixed; and Calmet elsewhere, denies that the ark commonly followed the army. (Haydock)