Numbers 7:1, 10, 84

And it came to pass on the day that Moses had made an end of setting up the tabernacle, and had anointed it and sanctified it, and all the furniture thereof, and the altar and all the vessels thereof, and had anointed them and sanctified them

And the princes offered for the dedication of the altar in the day that it was anointed, even the princes offered their oblation before the altar.

This was the dedication of the altar, in the day when it was anointed, by the princes of Israel: twelve silver platters, twelve silver bowls, twelve golden spoons