In Genesis 26, the well signifies that people who were in the mere worldly knowledge of truths of faith were unwilling to make the internal nature of the Divine more well-known. (Arcana Coelestia 3412)

Broken cisterns in Jeremiah 2:13 signify false doctrines.

In Deuteronomy 6:11, cisterns hewn out signify the interiors of the natural mind–full of knowledge of good and truth. (Apocalypse Explained 617[13])

(Odkazy: Arcana Coelestia 2702 [1-17])

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'.