1 Then Saul communed with Jonathan his son, and with all his servants, that they should kill David. But Jonathan Saul's son had a great favour to David,
1 Samuel 19:1 Cross References - MSTC
1 Samuel 18:1
1 And when he had made an end of speaking unto Saul, the soul of Jonathan was knit with the soul of David; insomuch that Jonathan loved him as his own soul.
1 Samuel 18:9
9 Wherefore Saul looked sourly upon David from that day forward.