A.T. Robertson Commentary Galatians 5:15

"But if ye bite and devour one another, take heed that ye be not consumed one of another." — Galatians 5:15 (ASV)

If ye bite and devour one another (ε αλληλους δακνετε κα κατεσθιετε). Condition of first class assumed as true. Two common and old verbs often used together of wild animals, or like cats and dogs.

That ye be not consumed one of another (μη υπ' αλληλων αναλωθητε). Negative final clause with first aorist passive subjunctive of αναλισκω, old word to consume or spend. In N.T. only here and Lu 9:54. There is a famous story of two snakes that grabbed each other by the tail and each swallowed the other.