Cities of the mountain and cities of the plain (Jeremiah 33:13) signify doctrines of charity and faith.

(Izinkomba: Arcana Coelestia 2418)

6151. 'Therefore they did not sell their ground' means that for this reason they had no need to renounce those things or surrender them. This is clear from the meaning of 'selling' as renouncing, dealt with above in 6143, and so surrendering, since that which is renounced is surrendered to another; and from the meaning of 'ground' - that of the priests of Egypt - as the capacity to receive good in the natural, also dealt with above, in 6148. That for this reason they had no need to - to renounce and surrender those things - is meant by 'therefore they did not'.