It happened as they came, when David returned from the slaughter of the Philistine, that the women came out of all the cities of Israel, singing and dancing, to meet king Saul, with tambourines, with joy, and with instruments of music.
"And Saul eyed David from that day on"  (1 Samuel 18:9).  This means that from that day forward, Saul's jealous envy and hatred of David would never be diminished.  Saul probably guessed, at this point of time, that David would be his successor.  His Majesty resolved to do everything in his power to prevent that from happening.