Operating the Temple required strict organization, and a vital part of this system was the careful distribution of guard duties. Dedicated groups were formed to serve as gatekeepers [מצודת דוד, ביאור שטיינזלץ]. This security detail included members of the Korah family [מלבי״ם, ביאור שטיינזלץ], notably featuring Meshelemiah, a familiar figure from earlier accounts of those who guarded the thresholds [רש״י, מלבי״ם].
Commentators offer two complementary perspectives on how these gatekeepers were organized. One approach suggests that, unlike other Temple duties that ran on continuous rotating shifts, the guards were assigned based on the physical layout of the gates. In this system, lots were drawn simply to decide which member of the guard would stand at which specific entrance [רש״י].
Another perspective emphasizes that the gatekeepers were organized into twenty-four distinct divisions, mirroring the structure of other groups serving in God's house [רלב״ג, מלבי״ם]. According to this view, there were exactly twenty-four locations within the Temple complex that required security. The specific men named in the records were the twenty-four captains personally appointed over these unique gates. Under their command, these leaders managed a massive operation of thousands of regular guards who actively protected the sacred grounds [מלבי״ם].