Saul had been king, but he kept disobeying God so God asked Samuel to find a new king. God said to Samuel, "Go to Bethlehem and there is a man named Jesse with eight sons. One of them will be the next king."
When Samuel first met the sons he automatically thought that the oldest son named Eliab would be the king that God had chosen. But the Lord said to Samuel, "Do not look at the way he looks or how big he is. Eliab is not the one I have chosen, the way he looks doesn't matter to me, I look at the heart."
Jesse brought more of his sons to meet Samuel but none of them God had chosen either. Samuel asked Jesse, "Have I met all your sons?" Jesse replied, "I have one son left named David, he's the youngest, and he's out looking after the sheep. I will bring him here to meet you."
As soon as Samuel saw him the Lord spoke to him and said, "He is the one." So Samuel anointed him with oil which was a special way of promising him that he would be the next king. And from that day on the power of the Lord was with David.
David continued to take care of his father's sheep in the fields. When he didn't have much to do in the field he played instruments, and wrote songs and poems that you can find in the book of Psalms in your Bible.
Meanwhile Saul was still king and he ruled people called Israelites. David and his family were Israelites too. The Israelites weren't getting along with people named the Philistines.
The problem with the Philistines was that they had many giants living in their land. One of the strongest and biggest giants was named Goliath. He was over nine feet tall, which is taller than any person recorded in the Guinness Book of World Records. He would've had to bend way down to get through a regular door.
Goliath was covered with armor to protect him and carried a big spear. Every morning and every evening for forty days he shouted to the Israelites in his big deep voice, "Hey, you guys! I dare you to find one man to fight me. If he can beat me we will become your servants, but if I win you will all become our servants."
When Saul and all his men heard this they were very afraid. Three of these men were David's three oldest brothers. They were the only ones in David's family that could go fight because they were old enough.
Now David's father Jesse heard about the giant and was worried for his sons. He called David out of the fields and asked him to take some food to his brothers and report back how they are doing.
So David set off to visit his brothers. As he approached them he heard Goliath shouting his challenge like he did every morning. "Isn't someone going to stand up to this man?" David asked the men in the army. "Then I will fight this giant Philistine."
One of the men overheard this and ran to Saul and told him what David said. Saul approached David and said, "You can't fight Goliath, you're only a boy and he has been fighting for many years." But David said to Saul, "I have had to fight lions and bears to protect my father's sheep. God helped keep me safe then and he will help keep me safe now."
It was too bad that Saul the king wasn't trusting in God to help him, he didn't know what to do to beat Goliath. Then this young boy named David came and he knew in one day exactly what to do, and trusted that God would help him. That's why God loved David's heart and wanted him to be king.
So Saul dressed David in heavy armor to protect him from Goliath but David took it off. It was so heavy he could hardly walk and he knew that God would keep him from harm. Instead David went to a stream nearby and found five smooth stones, put them in a pouch around his waist, and with his sling he went to Goliath.
As David approached Goliath, Goliath looked at David and thought it was a joke. Goliath thought that he could easily beat David and it was funny that Saul would send a small boy to fight him. But David said to him without fear, "You fight with a sword and I come with God on my side and today everyone will know that there is one true God in this land."
Goliath didn't care what David said and he moved closer to attack him, David ran quickly to meet him. Reaching into his pouch he pulled out a stone, put it into his slingshot and shot it at Goliath. The stone had hit him right between his eyes and suddenly Goliath started to loose his balance.
He fell with a loud thud right on his face. David had done it, he beat the giant Philistine! When the rest of the Philistines saw this they ran away and David became a hero to all the people in Israel.