John Gill Commentary Leviticus 8:11

"And he sprinkled thereof upon the altar seven times, and anointed the altar and all its vessels, and the laver and its base, to sanctify them." — Leviticus 8:11 (ASV)

And he sprinkled thereof upon the altar seven times The altar of burnt offering; the order for anointing it is given in (Exodus 30:28) (40:10) but in that no directions are given for the manner of doing it by sprinkling, nor the number of times it was to be sprinkled: hence Jarchi confesses his ignorance, and says, "I know not how it was ordered about these sprinklings;" but no doubt Moses was instructed of God in what manner to anoint it, and how often; and the number seven may denote the perfect unction of it, and made it a fitter type of Christ, who received the unction of the Spirit without measure.

and anointed the altar, and all its vessels pans, shovels, basins, flesh hooks, and fire pans:

both the laver and his foot which was for the priests to wash at; and very probably this was done before Moses brought Aaron and his sons thither and washed them, (Leviticus 8:6) since it seems most proper that it should be consecrated before used, as it follows:

to sanctify them set them apart for sacred use.