Shmuel Alef 11:6-7

And the Ruach Elohim came upon Sha'ul when he heard those devarim, and his anger was kindled greatly. And he took a tzemed bakar, and cut them in pieces, and sent them throughout all the territory of Yisroel by the hands of malachim, saying, Whosoever cometh not forth after Sha'ul and after Shmuel, so shall it be done unto his bakar. And the pachad HASHEM fell on HaAm, and they came out as ish echad.