Bede

And Saul arose and went down to the desert of Ziph, etc. Understand Gabaa of Achila, not the city of Saul, but the hill of Achila, which is called Gabaa in Hebrew. Therefore, incited by perverse teachers, the kingdom of the Jews was stirred up to persecute the Lord, having in the army of impiety those who were prepared to fight against faith, hope, and charity, advancing to war as if in a triple line: of infidelity, despair, and hatred. …

Commentary on Samuel ↗