Arcana Coelestia #852
852. That the “seventh month” signifies what is holy, is abundantly evident from what has been shown before (n. 84-87, 395, 716). This holiness corresponds to what was said with reference to the celestial man (Genesis 2:3): that the seventh day was sanctified, because God rested therein.
Arcana Coelestia #717
717. It is also evident from all this that the subject here treated of is the things of man’s will, or the good and holy things in him which are predicated of the will. For it is said that he should “take of the clean beast by sevens;” and the same is said in the following verse concerning the “fowl.” But in the preceding chapter (verses 19-20), it is not said that he should “take by sevens” but by “twos” or pairs; because there things of the understanding are treated of, which are not holy in themselves, but are holy from love, which is of the will.