When the LORD rejected naughty Saul as king he used the prophet Samuel to find his replacement. The Lord sent Samuel to Jesse of Bethlehem because he had "chosen one of his sons to be king."
Samuel had preconceived notions of what a king should look like and when the first son of Jesse, Eliab, was brought to him Samuel thought, "Surely the LORD's anointed stands here before the LORD."
Brother after brother after brother after brother after brother was rejected.
It came down to the youngest boy of seven boys - David.
When David was brought to Samuel, the LORD said, "Rise and anoint him, he is the one. So Samuel took the horn of oil and anointed him in the presence of his brothers, and from that day on the Spirit of the LORD came upon David in power."
He was anointed, but David wasn't officially king yet. And there is so much more intrigue to the story.
King Saul was being tormented by an evil spirit sent from the Lord when the Spirit of the LORD departed from Saul. (Check it out for yourself and read Saul's relationship with the LORD and why the LORD rejected him).
A king without the Spirit of the LORD.
Rejected by the LORD. The rejection wasn't just a turning away, but the LORD sent an evil spirit to torment Saul.
God left. Evil entered.
David's first weapon, the one before the slingshot and five stones......was a harp.
A harp was the weapon that caused the evil spirit to leave Saul.
One of Saul's servants said,
"I have seen a son of Jesse of Bethlehem who knows how to play the harp. He is a brave man and a warrior. He speaks well and is a fine-looking man. And the Lord is with him."
The weapon was placed in David's hands, the strumming would begin...
"Whenever the spirit from God came upon Saul, David would take his harp and play. Then relief would come to Saul; he would feel better, and the evil spirit would leave him."
A young son with a harp and a sling and five stones would become a leader of hundreds of thousands whose weapons would bring death and destruction to all who God allowed. The Mighty Men were trained, their weapons ready.
Oh that a harp would be the only weapon needed.
W is for Weapons of Warriors
1 Samuel 8-31