Upon the horns of the altar; not of incense, as some would have it, but of the burnt-offerings, as may appear,
1. Because it was that altar at the bottom whereof the blood was to be poured, as it is here expressed; but that was not done at the altar of incense, as is evident and confessed. Compare Leviticus 16:18, &c.
2. It was that altar upon which the parts of the sacrifices were burnt, as it here follows, Exodus 29:13, for there is no distinction here between the two altars. It is true, in the following sin-offerings of the priests the blood was put upon the horns of the altar of incense, Leviticus 4:7. But it must be considered,
1. That the blood was not poured out at the bottom of that altar.
2. Because Aaron and his sons were not yet complete priests, but private persons, and therefore did this at the same altar which the people used in their sin-offerings, Leviticus 4:25,30.