3 The men of Judah then said to the Simeonites their fellow Israelites, “Come up with us into the territory allotted to us, to fight against the Canaanites. We in turn will go with you into yours.” So the Simeonites went with them.

Read Judges 1:3 Using Other Translations

And Judah said unto Simeon his brother, Come up with me into my lot, that we may fight against the Canaanites; and I likewise will go with thee into thy lot. So Simeon went with him.
And Judah said to Simeon his brother, "Come up with me into the territory allotted to me, that we may fight against the Canaanites. And I likewise will go with you into the territory allotted to you." So Simeon went with him.
The men of Judah said to their relatives from the tribe of Simeon, “Join with us to fight against the Canaanites living in the territory allotted to us. Then we will help you conquer your territory.” So the men of Simeon went with Judah.