Joshua 3:6

3:6 Joshua told the priests, “Pick up the ark of the covenant and pass on ahead of the people.” So they picked up the ark of the covenant and went ahead of the people.

Joshua 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.