Arcana Coelestia #8060
8060. 'Unleavened bread shall be eaten seven days' means that they are to be purified thoroughly from falsities. This is clear from the meaning of 'eating unleavened bread' as making good purified from falsities one's own, as just above in 8058, and since the words here repeat the command they mean that the purification must be done thoroughly; and from the meaning of 'seven days' as that which is holy and also a complete state, dealt with above in 8058.
Arcana Coelestia #8058
8058. 'Seven days you shall eat unleavened bread' means purification from falsities. This is clear from the meaning of 'seven days' as that which implies something holy, dealt with in 395, 433, 716, 881, 5265, 5268, and as a complete state, 6508; and from the meaning of 'eating unleavened bread' as making truth one's own and as purification from falsity, for 'the unleavened' is good purified from falsity, and 'eating' making one's own, 3168, 3513, 3596, 3832, 4745. The reason why 'the unleavened' is good purified from falsity is that 'bread' means good and 'yeast' falsity.