1 Samuel 20:17

And Jonathan caused David to swear again, because he loved him: for he loved him as he loved his own soul.

Cross-reference

1 Samuel 18:1 describes Jonathan's soul knit to David's — the same love phrase used in 20:17.

1 Samuel 18:3 ties Jonathan's love and covenant — identical language to the love in 20:17.

2 Samuel 1:26 records David's lament, directly echoing Jonathan's extraordinary love — the same love that drove their covenant in 1 Samuel 20:17.

2 Samuel 21:7 explicitly mentions the oath between David and Jonathan as reason for sparing Mephibosheth — direct narrative consequence.

Proverbs 17:17 says a friend loves at all times — directly illustrated by Jonathan's unwavering love for David.