Read Judges 12:3 Using Other Translations
And when I saw that ye delivered me not, I put my life in my hands, and passed over against the children of Ammon, and the LORD delivered them into my hand: wherefore then are ye come up unto me this day, to fight against me?
And when I saw that you would not save me, I took my life in my hand and crossed over against the Ammonites, and the LORD gave them into my hand. Why then have you come up to me this day to fight against me?"
So when I realized you weren’t coming, I risked my life and went to battle without you, and the LORD gave me victory over the Ammonites. So why have you now come to fight me?”