1 Samuel 10:19-21

19But today you have rejected your God, who Himself saves you from all your disasters and distresses; yet you have said, ‘No! Set a king over us.’ Now then, present yourselves before the Lord by your tribes and by your families (clans).”

20And when Samuel brought all the tribes of Israel near, the tribe of Benjamin was chosen by lot.

21Then he brought the tribe of Benjamin near by their families, and the family of Matri was chosen by lot. And Saul the son of Kish was chosen by lot; but when they looked for him, he could not be found.