Jephthah came home to Mizpah. His daughter ran from the house to welcome him home—dancing to tambourines! She was his only child. He had no son or daughter except her. When he realized who it was, he ripped his clothes, saying, "Ah, dearest daughter—I'm dirt. I'm despicable. My heart is torn to shreds. I made a vow to God and I can't take it back!" (Judges 11:34-35)
"I made a vow to God and I can't take it back!"(11:35)
That is the vow He wants - to be number one in my heart.