Deuteronomy 5:23

Deu 5:23 And it came to pass, when ye heard the voice out of the midst of the darkness, (for the mountain did burn with fire,) that ye came near unto me, [even] all the heads of your tribes, and your elders;

Ver. 23. Even all the heads of your tribes. ] These are called "all Israel," Deu 5:1 as being their representatives.