I put my life in my hands, i.e. I exposed myself to utmost danger; as a man that carries a brittle and precious thing in his hand, which may easily either fall to the ground, or be snatched from him. The same phrase is used 1 Samuel 19:5, 1 Samuel 28:21 Job 13:14 Psalms 119:109. Wherefore then are ye come up unto me? why do you thus requite my kindness in running into such hazard to preserve you and yours?
Related Commentaries of Judges 12:3
Judges 12:3
3 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?