'Words,' as in Exodus 34:28, signify everything pertaining to doctrine.

In Genesis 15:1, words signify revelation, after the Lord's boyhood combats. (Arcana Coelestia 1787)

Words signify things, and things are goods and truths. (Arcana Coelestia 1785, 1801, 5272)

In Genesis 11:1, this signifies unity of doctrine. (Arcana Coelestia 1288)

In Exodus 8:10, 13, words signify communication of the Lord's Word and confirmation. (Arcana Coelestia 7406)

In Exodus 20:1, this signifies divine truths for people who are in the heavens and on earth. (Arcana Coelestia 8861, 8862)

1800. Verse 4 And behold, the word of Jehovah came to him, saying, This man will not be your heir, but he who comes out of your own loins will be your heir.

'Behold, the word of Jehovah came to him' means a reply. 'Saying, This man will not be your heir' means that that which is external will not be the heir of His kingdom. 'But he who comes out of your own loins' means people in whom love to Him and love towards the neighbour are present. 'He will be your heir' means that these will become the heirs.