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.

Judah said unto Simeon ... Come up with me. Being conterminous tribes (Joshua 19:1), they had a common interest, and were naturally associated in this enterprise.

Continues after advertising
Continues after advertising