Tanach · Rishonim on Tanach · Ibn Ezra · Torah

Ibn Ezra on Leviticus 9:1/אבן עזרא על ויקרא ט׳:א׳

אויהי ביום השמיני. היה נראה לנו כי ביום השמיני שמיני לניסן כי המשכן הוקם באחד לחדש רק המעתיקים אמרו שהיה ראש חדש ניסן ובשבעת ימי המלואים היה משה מקים את המשכן בכל יום וסותרו כדי להרגיל בו וללמד:
1AND IT CAME TO PASS ON THE EIGHTH DAY. It would have appeared to us that the eighth day is the eighth day of Nisan, for the tabernacle was erected on the first day of the month.1 However, the transmitters of tradition2 said that the reference is to the first of Nisan.3 7:1. Moses erected and took apart the tabernacle on each one of the seven days of consecration4 to train and teach.5 how to do it.
בקרא משה לאהרן ולבניו. ויצאו מפתח אהל מועד או העדה נכנסה אל החצר:
2THAT MOSES CALLED AARON AND HIS SONS. And they went out from the opening of the tent of meeting.6 left the opening of the tent of meeting where they had to stay during the seven days of consecration (Lev. 8:35) and went into the camp of Israel to meet the elders (Filwarg). On the other hand, the congregation entered the courtyard.7. During the seven days of consecration the kohanim and the elders were separated. On the eighth day Moses spoke to them as a group. Hence the two possibilities offered by I.E. as to how they met.