Now it fell on a day, that Jonathan the son of Saul said to the young man who bore his armor, Come, and let us go over to the Philistines' garrison, that is on yonder side. But he didn't tell his father.
When it was revealed that Jonathan was the offender, Saul gave a further demonstration of his unpredictable nature. He did not carry out his vow, but heeded the voice of those who demanded Jonathan’s release (40-46).