“After David had finished talking with Saul, he met Jonathan, the king’s son. There was an immediate bond between them, for Jonathan loved David. From that day on Saul kept David with him and wouldn’t let him return home. And Jonathan made a solemn pact with David, because he loved him as he loved himself. Jonathan sealed the pact by taking off his robe and giving it to David, together with his tunic, sword, bow, and belt.

Whatever Saul asked David to do, David did it successfully. So Saul made him a commander over the men of war, an appointment that was welcomed by the people and Saul’s officers alike.

When the victorious Israelite army was returning home after David had killed the Philistine, women from all the towns of Israel came out to meet King Saul. They sang and danced for joy with tambourines and cymbals. This was their song:

“Saul has killed his thousands,
and David his ten thousands!”

This made Saul very angry. “What’s this?” he said. “They credit David with ten thousands and me with only thousands. Next they’ll be making him their king!” So from that time on Saul kept a jealous eye on David.” 1 Samuel 18:5-9 NLT

“He must increase, but I must decrease.” John 3:30 ESV
“Accept one another, then, just as Christ accepted you, in order to bring praise to God.” Romans 15:7 NIV