Ibn Ezra on Leviticus 8:10

ויקח משה את שמן המשחה. טעמו וכבר לקח קודם משיחת אהרן: AND MOSES TOOK THE ANOINTING OIL. It means that Moses had taken the oil¹¹And anointed the tabernacle and its furniture. before the anointing of Aaron.¹²Scripture tells of the dressing of Aaron in the priestly vestments in verses 7-9. I.E. assumes that Aaron was anointed as soon as the garments were placed upon him (see Ex. 40:15). The Torah then goes on to tell of the anointing of the tabernacle and its furniture in verses 10-12. It then tells of the dressing of Aaron’s sons (v. 13). However, Ex. 40:9-12 tells us that the anointing of the tabernacle took place before the anointing of Aaron. Hence I.E.’s interpretation.