Arcana Coelestia #6172
6172. 'And were fruitful, and multiplied exceedingly' means resulting forms of the good of charity and resulting truths of faith. This is clear from the meaning of 'being fruitful' as bringing forth forms of the good of charity, and from the meaning of 'multiplying' as bringing forth truths of faith, dealt with in 43, 55, 913, 983, 2846, 2847. For the expression 'to be fruitful' is derived from the word 'fruits', by which the works of charity are meant in the internal sense, while the expression 'to be multiplied' is derived from the word 'multitude', which in the internal sense is used to refer to the truths of faith, since 'much' (multum) refers in the Word to truths, but 'great' to forms of good.
Luke 4:26-28
26
Elijah was sent to none of them, except to Zarephath, in the land of Sidon, to a woman who was a widow.
27
There were many lepers in Israel in the time of Elisha the prophet, yet not one of them was cleansed, except Naaman, the Syrian."
28
They were all filled with wrath in the synagogue, as they heard these things.