John Gill Commentary Numbers 7:88

"and all the oxen for the sacrifice of peace-offerings twenty and four bullocks, the rams sixty, the he-goats sixty, the he-lambs a year old sixty. This was the dedication of the altar, after that it was anointed." — Numbers 7:88 (ASV)

And all the oxen for the sacrifice of the peace offerings [were] twenty and four bullocks Each prince bringing two:

the rams sixty, the he goats sixty, the lambs of the first year sixty ; five of each being brought by every prince; so that the whole number of beasts for peace offerings only, which were to feast with, were two hundred four;

this [was] the dedication of the altar after that it was anointed ; this clearly shows, that it was not the precise day the altar was anointed the dedication was made, but some little time after; even that the first prince brought his presents and offerings for the dedication of it.