Isaiah 9:21

Manasseh, Ephraim … Manasseh Ancient tribal jealousies would naturally be revived in a period of anarchy and civil war. Something of this kind seems to be implied in the account of the accession of the usurper Pekah, who murdered Pekahiah, at the head of a band of fifty Gileadites (2 Kings 15:25). The tribal names, however, need not be taken quite literally; indeed it is hardly probable that the tribes had preserved their separate identity to so late a time.