Joshua 4:4

Then Joshua called the twelve men, whom he had prepared of the children of Israel, out of every tribe a man:

Cross-reference

Joshua 4:2 commands choosing twelve men; here in 4:4, Joshua executes that command by calling the appointed men.

1 Kings 18:31 shows Elijah also using twelve stones to represent the twelve tribes — a parallel to the twelve men selected here as tribal representatives.