A rod.

Numbers 1:5-16
These are the names of the men who are to assist you: From the tribe of Reuben, Elizur son of Shedeur; . . .

Numbers 2:3-30
On the east side, toward the sunrise, the divisions of Judah are to camp under their banner: The leader of the sons of Judah is Nahshon son of Amminadab, . . .

Numbers 10:14-27
First, the divisions of the camp of Judah set out under their banner, with Nahshon son of Amminadab in command. . . .

twelve rods

Genesis 49:10
The scepter will not depart from Judah, nor the staff from between his feet, until Shiloh comes and the allegiance of the nations is his.

Exodus 4:2, 17
And the LORD asked him, "What is that in your hand?" "A staff, " he replied. . . .

Psalm 110:2
The LORD will extend Your mighty scepter from Zion: "Rule in the midst of your enemies."

Psalm 125:3
For the scepter of the wicked will not rest upon the land allotted to the righteous, so that the righteous will not put forth their hands to injustice.

Ezekiel 19:14
Fire has gone out from its main branch and devoured its fruit, and no strong branch that remains is fit for a ruler's scepter.' This is a lament and shall be used as a lament."

Ezekiel 21:10, 13
it is sharpened for the slaughter, polished to flash like lightning! Should we rejoice in the scepter of My son? The sword despises every tree. . . .

Ezekiel 37:16-20
"And you, son of man, take a single stick and write on it: 'Belonging to Judah and to the Israelites associated with him.' Then take another stick and write on it: 'Belonging to Joseph--the stick of Ephraim--and to all the house of Israel associated with him.' . . .

Micah 7:14
Shepherd with Your staff Your people, the flock of Your inheritance. They live alone in a woodland, surrounded by pastures. Let them graze in Bashan and Gilead, as in the days of old.