John Wesley on Leviticus 6:9

And the Lord spake - Hitherto he hath prescribed the sacrifices themselves; now he comes to the manner of them. The burnt - offering - The daily one, which Exo 29:38, Num 28:3, as the following words shew. This was to be so managed and laid on piece after piece, that the fire might be constantly maintained by it. The morning burnt - offerings were to be kept burning all the day from morning to night also; but he mentions not that, because there was such a constant succession of sacrifices in the day - time that there needed no law for feeding and keeping in the fire then; the only danger was for the night, when other sacrifices were not offered, but only the evening burnt - offering, which if it had been consumed quickly, as the morning burnt - offering was, there had been danger of the going out of that fire, which they were commanded diligently and constantly to keep in.