The Kli Yakar (7:11) reveals that it says ‘this is the Torah’ five times in reference to the various korbanos, hinting at the five books of the Torah. For anyone who learns through the five books of the Torah is as if they have offered up all five korbanos. How so? For, as the Kli Yakar explains, each of the five korbanos correspond to one Chumash. The olah (the first korban) is paired with Chumash Bereishis (the first Chumash), for Hevel, Noach, Avraham, and Yaakov all offered olah korbanos in Bereishis. Furthermore, Shemos is paired with the mincha offering, for the mincha offering comprises of matzah - Shemos has in it the mitzvah of matzah and the korban pesach. Similarly, Vayikra corresponds to the chatas offering, for the root of all sins is the chet ha’egel, and throughout Vayikra there are references to the atonement for this sin - and the chatas comes to atone for sins. Moreover, the greatest atonement for the chet ha’egel is the Mishkan, and Vayikra deals with topics related to the Mishkan, as the Ramban in his hakdama to Vayikra highlights. Additionally, Bamidbar is paired with the asham offering, for the topic of ‘asham’ crops up in Bamidbar (5:6). Finally, Devarim matches the shlamim, for this korban pops up in both the sedras of Ki Savo (27:7) and Re’eh (12:27). Moreover, the shlamim is always the last of the korbanos, and Devarim is the final Chumash.