1 Samuel 14:39
For, as the Lord liveth, which saveth Israel, though it be in Jonathan my son, he shall surely die. But there was not a man among all the people that answered him.
Cross-reference
1 Samuel 14:24 records Saul's oath that no one eat — the very curse that leads to his vow in 14:39 to kill the violator.
1 Samuel 14:44 shows Saul carrying out his vow against Jonathan — the direct fulfillment of his declaration in 14:39.
1 Samuel 14:1 sets up Jonathan's secret attack — the event that leads to the oath in 14:39. Direct narrative link.
In 1 Samuel 19:6, Saul swears 'As the LORD liveth, he shall not be slain' — directly reversing his earlier oath to kill Jonathan.
In 1 Samuel 28:10, Saul swears 'As the LORD liveth' to the witch — same oath formula but promising safety, not death.
In 2 Samuel 12:5, David uses the identical oath 'As the LORD liveth... shall surely die' — mirroring Saul's rash vow.
In Matthew 14:9, Herod similarly feels bound by a rash oath leading to John's death, echoing Saul's dilemma here.