דברי הימים ב, פרק א׳, פסוק ו׳

The grand gathering at the Tabernacle is defined by a staggering display of devotion, centered around a massive number of burnt offerings upon the copper altar. While King Solomon is recognized as the one bringing these sacrifices, he did not perform the rites himself. Rather, he issued the directive, and the priests carried out the physical act of offering the sacrifices before God [ביאור שטיינזלץ].

The sheer volume of a thousand burnt offerings highlights the magnitude of the event. Naturally, such an enormous number of sacrifices could not be processed in a single moment. Instead, the offerings were brought gradually over the course of Solomon's stay at the Tabernacle, continuing steadily until his eventual return to Jerusalem [רד"ק].