Albert Barnes Commentary Leviticus 10:19

"And Aaron spake unto Moses, Behold, this day have they offered their sin-offering and their burnt-offering before Jehovah; and there have befallen me such things as these: and if I had eaten the sin-offering to-day, would it have been well-pleasing in the sight of Jehovah?" — Leviticus 10:19 (ASV)

That is: “Behold this very day, in which we have done our part in sacrificing sin-offerings and burnt-offerings to the Lord, this great calamity has befallen me. Could it have been well-pleasing to the Lord if those who have been so humbled as I and my sons have been by the sin of our relations and the divine judgment, had feasted on the most holy flesh of the sin-offering?”