The altar — Of burnt — offerings, and incense too, as appears from the matter of their offerings. Not for the first dedication of them, for it is apparent they were dedicated or consecrated before this time by Moses and Aaron: but for a farther dedication of them, these being the first offerings that were made for any particular persons or tribes. In the day — That is, about the time, as soon as it was anointed.
Related Commentaries of Numbers 7:10
Numbers 7:10
10 And the princes offered for dedicating of the altar in the day that it was anointed, even the princes offered their offering before the altar.