Arcana Coelestia #486
486. Verse 4 And the days of Man after he beget Seth were eight hundred years; and he beget sons and daughters.
'Days' means periods of time and states in general. 'Years' means periods of time and states in particular. 'Sons and daughters' means the truths and goods that they perceived.
Arcana Coelestia #8537
8537. 'And the children of Israel ate the man[na] forty years' means making the good of truth their own in the state involving all temptations. This is clear from the representation of 'the children of Israel' as those who belong to the spiritual Church, dealt with in 6426, 6637, 6862, 6868, 7035, 7062, 7198; from the meaning of 'eating' as making one's own, dealt with in 3168, 3513(end), 3596, 4745; from the meaning of 'the man[na]' as the good of truth, dealt with in 8464; and from the meaning of 'forty years' as states involving temptations, 'years' meaning states, see 482, 487, 488, 493, 893, and 'forty' meaning temptations, 730, 862, 2272, 2273, 8098.