יחזקאל לז:טז פירוש: רש״י

And you, son of man, take for yourself one stick and write upon it, ‘For Judah and for the children of Israel his companions’ These four words write upon it, to say that this stick is Judah’s and the tribe of Benjamin’s, who joined him.

and take one stick and write upon it This is for Joseph: the stick of Ephraim and the remaining nine tribes, which followed Jeroboam, who was of the tribe of Ephraim.