Arcana Coelestia #9344
9344. 'You shall not make a covenant with them and their gods' means no contact with evils and falsities. This is clear from the meaning of 'making a covenant' as being joined together, dealt with in 665, 666, 1023, 1038, 1864, 1996, 2003, 2021, 6804, 8767, 8778, thus also being in contact with, for people who communicate with one another are joined to one another; from the meaning of the inhabitants of the land, to whom 'those with whom they were not to make a covenant' refers here, as evils, dealt with just above in 9342; and from the meaning of 'their gods' as falsities, dealt with in 4402 (end), 4544, 7873, 8867, 8941.
Arcana Coelestia #2003
2003. 'As for Me, behold, My covenant is with you' means union of the Divine Essence with the Human Essence. This is clear from the meaning of 'a covenant' as conjunction, dealt with in 665, 666, 1023, 1038. Here it is the union of the Divine Essence with the Human Essence, as is evident from this meaning and from the internal sense of what has gone before, and so from the actual words 'My covenant is with you'.