Sforno on Leviticus 14:36/ספורנו על ויקרא י״ד:ל״ו

1ופנו את הבית בטרם יבא, they can clear out the house before the priest’s arrival. In fact, that priest is warned not to arrive until all valuables have been cleared out of the house. During the time that this takes place the owners will be able to do teshuvah and pray and synchronise their prayer with that of the priest when he arrives. Simultaneous to this the priest will announce the period of isolation. In Vayikra Rabbah 17,7 we are told that our paragraph is an allusion to the eventual destruction of the first Temple, its rebuilding, as well as the destruction of the second Temple. The word וטהרו in our verse alludes to the ultimate rebuilding of the third Temple, this one not to be destroyed again.