Yosua 4:8

4:8 The Israelites did just as Joshua commanded. They picked up twelve stones, according to the number of the Israelite tribes, from the middle of the Jordan as the Lord had instructed Joshua. They carried them over with them to the camp and put them there.

Yosua 8:2

8:2 Do to Ai and its king what you did to Jericho ¹  and its king, except you may plunder its goods and cattle. Set an ambush behind the city!”

[8:2]  ¹ map For location see Map5 B2; Map6 E1; Map7 E1; Map8 E3; Map10 A2; Map11 A1.