'Number' in the Bible

and Joshua saith to them, 'Pass over before the ark of Jehovah your God unto the midst of the Jordan and lift up for you each, one stone on his shoulder, according to the number of the tribes of the sons of Israel,

And the sons of Israel do so as Joshua commanded, and take up twelve stones out of the midst of the Jordan, as Jehovah hath spoken unto Joshua, according to the number of the tribes of the sons of Israel, and remove them over with them unto the lodging-place, and place them there,