Albert Barnes Commentary Joshua 8:10

"And Joshua arose up early in the morning, and mustered the people, and went up, he and the elders of Israel, before the people to Ai." — Joshua 8:10 (ASV)

Numbered the people - Rather, perhaps, "mustered" or "arrayed" them for their march. The distance from the camp at Gilgal to Ai is about fifteen miles. In the evening of the day after the dispatch of the 5,000 who lay in wait, Joshua and the host might make their appearance in the neighborhood of the city.