Judges 5:15

And the princes of Issachar were with Deborah, although they brought no troops, their presence proved their interest in the campaign; even Issachar, and also Barak; he was sent on foot into the valley, he had only infantry under his command, but he made his furious, overwhelming attack nevertheless. For the divisions of Reuben there were great thoughts of heart; the tribe of Reuben, in its habitations along its brooks in the east country, reflected so long upon the necessity and the possibility of joining the army of Barak until it was too late.