2SA 18:2

2 And Dauid sent foorth the third part of the people vnder the hand of Ioab, and the thirde part vnder the hand of Abishai Ioabs brother the sonne of Zeruiah: and the other third part vnder the hand of Ittai the Gittite. and the King said vnto the people, I will go with you my selfe also.