'The Twelve' in the Bible

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

And the sons of Israel will do so as Joshua commanded, and they will lift up the twelve stones out of the midst of Jordan, as Jehovah spake to Joshua according to the number of the tribes of the sons of Israel, and they will pass them over with them to the lodging place, and they will deposit them there.

even the twelve stones hath Joshua raised up out of the midst of the Jordan, the place of the standing of the feet of the priests bearing the ark of the covenant, and they are there unto this day.

And the twelve stones which they took out of Jordan, Joshua put up in Gilgal.