Joshua 4:5 in the World English Bible
Joshua said to them, “Cross before the ark of the LORD your God into the middle of the Jordan, and each of you pick up a stone and put it on your shoulder, according to the number of the tribes of the children of Israel;
Context
4 Then Joshua called the twelve men, whom he had prepared of the children of Israel, out of every tribe a man:
5 And Joshua said unto them, Pass over before the ark of the LORD your God into the midst of Jordan, and take ye up every man of you a stone upon his shoulder, according unto the number of the tribes of the children of Israel:
6 That this may be a sign among you, that when your children ask their fathers in time to come, saying, What mean ye by these stones?