Arcana Coelestia # 2044
2044. And a son of eight days. That this signifies any beginning of purification whatever, is evident from the signification of “the eighth day.” A “week,” which is seven days, signifies an entire period of any state or time, as of reformation, of regeneration, of temptation, whether of man in particular, or of the church in general; thus a period is called a “week,” whether it be one of a thousand years, of a hundred, of ten, or of as many days, hours, minutes, and so on ((728) as may be seen from the passages cited in Part First, n. 728). And as the eighth day is the first day of a new week, it signifies any beginning whatever. This shows also that, as circumcision was itself a representative of purification, so also was the time of it, namely, the eighth day; not that they then entered into a purer state, and were purified on that account, but for the reason that, as “circumcision” signified purification, so “the eighth day” signified that this ought to be effected at all times, and thus always, as from a new beginning.
Arcana Coelestia # 84
84. Verses 2-3. And on the seventh day God finished His work which He had made; and He rested on the seventh day from all His work which He had made. And God blessed the seventh day, and hallowed it; because that in it He rested from all His work which God in making created. The celestial man is the “seventh day” which, as the Lord has worked during the six days, is called “His work;” and as all combat then ceases, the Lord is said to “rest from all His work.” On this account the seventh day was sanctified, and called the Sabbath, from a Hebrew word meaning “rest.” And thus was man created, formed, and made. These things are very evident from the words.