1 Chronicles 20:1-8 NIV
1In the spring, at the time when kings go off to war, Joab led out the armed forces. He laid waste the land of the Ammonites and went to Rabbah and besieged it, but David remained in Jerusalem. Joab attacked Rabbah and left it in ruins.
2 David took the crown from the head of their kinga —its weight was found to be a talentb of gold, and it was set with precious stones—and it was placed on David’s head. He took a great quantity of plunder from the city 3and brought out the people who were there, consigning them to labor with saws and with iron picks and axes. David did this to all the Ammonite towns. Then David and his entire army returned to Jerusalem.
War With the Philistines
4In the course of time, war broke out with the Philistines, at Gezer. At that time Sibbekai the Hushathite killed Sippai, one of the descendants of the Rephaites, and the Philistines were subjugated.
5In another battle with the Philistines, Elhanan son of Jair killed Lahmi the brother of Goliath the Gittite, who had a spear with a shaft like a weaver’s rod.
6In still another battle, which took place at Gath, there was a huge man with six fingers on each hand and six toes on each foot—twenty-four in all. He also was descended from Rapha. 7When he taunted Israel, Jonathan son of Shimea, David’s brother, killed him.
8These were descendants of Rapha in Gath, and they fell at the hands of David and his men.
Descendants of Rapha
Verse eight of 1 Chronicles 20 and verse twenty-two of 2 Samuel even establishes what these later passages are professing to do.
The timeframe of these passages are in the years which followed David ascension to the throne, many years after his exploits with Goliath as a young man (read from the first of 1 Chronicles). There is no possibility that these two later passages are to be confused with David's original heroic act.
They were showing that the four remaining descendants of the Philistine Rapha from Gath were subsequently defeated in David's name, though not necessarily physically by David (as the original Goliath had been).
Big Philistines Killed
#1. Goliath from Gath
(1 Samuel 17:4-7, 48-51 ... Nine feet tall. Spear like weaver's rod. 600 shekel spear head)
David (as a young man)
#2. Lahmi brother of Goliath the Gittite
(1 Chronicles 20:1 ... Spear like weaver's rod)
Goliath the Gittite
(2 Samuel 21:19 ... Spear like a weaver's rod)
Elhanan son of Jair
Elhanan son of Jaare-Oregim
(Jair "the Weaver")
#3. "Huge man"
(1 Chronicles 20:6, 2 Samuel 21:20 ... six fingers and six toes)
Jonathan son of Shimea,
brother of David
(2 Samuel 21:16-17 ... 300 shekel spear head)
Abishai son of Zeruiah
(2 Samuel 21:18)
Sibbecai the Hushathite