Parashas Vayikra · Aliyah 1 · Passuk 7
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim / related sources on the arrangement of the fire and wood.
E-Daf / Tsurras Hadaf (size=3 where available)
PDF of the daf / source
English: “And the sons of Aharon the kohen shall put fire on the altar” – even though fire descends from heaven, there is a mitzvah to bring ordinary fire as well.
Teaching of the partnership between the heavenly and the human in the service of the altar — even though fire descends from heaven, there is a mitzvah to bring ordinary fire as well.
Although Hashem supplies the fire from above, the kohanim are still commanded to add fire of their own, teaching that human effort and participation remain essential even when divine assistance is present.