What we read about here in this chapter and the last chapter, goes together with what we read in 1 Chronicles 17 and 1 Chronicles 18. They are not recorded in chronological order, rather they are written to let us know about the events which happened after the Ark was brought to Jerusalem, 2 Samuel 6:12-15.
This chapter begins with the words, ‘in the course of time’, which implies that this chapter, along with the next two chapters happened over a period of several years. If David wanted to remain king and further establish his kingship then he was going to have to defeat all of Israel’s enemies.
David’s first threat was found in their old foes, the Philistines they were a constant thorn in the flesh for Israel, Numbers 33:55, since Israel took over Palestine. David’s main aim was to get rid of all the enemies of Israel in Palestine, or at the very least bring them into subjection.
David’s second threat was the Moabites, David totally massacred them, which is strange because there was a time when David trusted the Moabites, when his father and mother stayed with the king of Moab while he was a fugitive from Saul, 1 Samuel 22:3-4. We don’t know exactly what the Moabites had done to provoke David to take such drastic actions again them, but we presume it must have been something terrible.
Notice that David hamstrung all the chariot horses, Joshua 11:6 / Joshua 11:9, this appears to be very cruel, but in this case very necessary. If an army has no horses to pull their chariots, then the chariots would become useless. The shields of gold were possibly valuable ornaments worn by the Syrian soldiers, 1 Kings 10:16.
Tou, king of Hamath obviously didn’t want to get involved in a battle with David and so he sends David his congratulations for defeating Hadadezer, who was one of Hamath’s enemies.
Hamath was the northeastern stronghold of the Solomonic Empire, 2 Kings 14:25. The people of Hamath were descendants of Ham and Canaan, Genesis 10:18. Joram brought David a lot of valuable gifts, Psalms 18:43-44.
David continues his conquest by killing eighteen thousand Edomites. Coffman says the following about this passage.
The avid seekers of ‘contradictions’ or ‘discrepancies’ are diligent to point out that David is here said to have slain those Edomites, but that 1 Chronicles 18:13 ascribes the victory to Abishai, and that 1 Kings 11:15-16, and the heading of Psalm 60 declare that it was Joab who did it! However, as Willis noted, David was involved as king, Joab was commander of the army, and Abishai had charge of that particular battle.
Because of David’s conquests over all these armies, Israel as a whole became very rich from the spoils of war. The nations around were becoming poorer whilst Israel was getting richer as a nation, 1 Chronicles 18:1-13.
Unlike Saul before him, David as king of Israel treated people justly and right, he treated them fairly, 1 Chronicles 18:14-17. Saul was only bothered about himself, and his rule and didn’t care how he treated people as long as he got his own way but David had people’s hearts in his mind, he was for the people, he wasn’t in a power trip but genuinely cared for the welfare of others. Matthew 20:25-28 / 1 Peter 5:3.
What we read here is a list of David’s administrators for the business of the kingdom, among whom the sons of David were certainly included, as we learn later in the activities of Absalom. The parallel inspired account tells us exactly what the functions of David’s sons were, 1 Chronicles 18:17. We must remember, despite what the text says here, that David’s sons were not priests as we understand the word priest.
R. Payne Smith, says the following about the word, ‘priests’ used here. In the time of the writing of 1 Kings, this word, ‘kohen’, as a word for ‘priest’ was already becoming obsolete, as proved by 1 Kings 4:5, and therefore the author of 1 Chronicles 18:17, writing at a still later time, changed the passage to give the correct meaning.
We are certain that the Chronicler knew what the passage in 2 Samuel 8:18 meant, and that he was also aware that the word, ‘kohen’ had gone out of use as a term for chief officials; and so he properly rendered the passage thus, ‘David’s sons were the chief officials in the service of the king.’
"For I am with you, and no one is going to attack and harm you, because I have many people in this city."