Shared ground
This verse presents Israel’s conflict with the Philistines as ongoing and recurring (“after this… war arose”). It also highlights how a larger battle can be represented by a single named exploit: Sibbecai (identified as “the Hushathite”) kills a Philistine warrior, Sippai. The writer treats that victory as significant and then summarizes the outcome with a short closing line: “they were subdued.”
The passage also contributes to a wider biblical memory of dangerous Philistine champions. Calling Sippai one of the “sons of the giant” signals that this opponent belonged to a feared group or line, and that defeating him carried special weight (compare the parallel notice in 2 Samuel 21:18).
Where interpretation differs
1) Who are “they” in “they were subdued”?
Some read “they” as the Philistines: the enemy was brought under control in this episode. Others think “they” could refer more broadly to “the Philistines in that area / in that phase of war” rather than only the immediate group present at the duel.
2) What does “sons of the giant” mean?
Some take it as literal family descent from a particular giant figure (often linked in people’s minds with the wider “giant” traditions). Others take it as a label for a warrior class or a traditional way of describing unusually formidable fighters, without needing to specify exact biological descent.
Why the disagreement exists
The verse is a compressed battle notice. It gives one decisive action (Sibbecai kills Sippai) and then a broad result (“they were subdued”) without spelling out the scale of the campaign. Also, “sons of the giant” is a brief tag that can function either as genealogy or as a recognized war-story designation; the verse itself does not explain which.
What this passage clearly contributes
Explicitly, the text claims: a Philistine war broke out at Gezer; Sibbecai the Hushathite killed Sippai; Sippai is identified with the “sons of the giant”; and the outcome is described as subduing “them.” Theologically by inference (not directly stated), the verse supports a theme found throughout these David-era battle summaries: Israel’s security is narrated through representative champions, and victory over intimidating enemies is presented as part of Israel’s wider dominance in that period (Gezer as a strategic border site helps explain why this clash mattered).