In Exodus 15:20, this signifies the pleasant nature and affection of spiritual truth. (Arcana Coelestia 9339)

In Psalm 30:11, this concerns the pleasant nature of truths and the joy of goods. (Arcana Coelestia 4779[5])

In Exodus 32:19, this signifies the interior festivity of a nation in hellish worship corresponding to perverted external loves. (Arcana Coelestia 10459)

In Exodus 15:20, dances relate to the affection of spiritual good or the good of truth and signify its pleasant nature and joy.

(Reference: Arcana Coelestia 8339)

10459. 'That he saw the calf, and the dances' means the hellish worship, which was in keeping with the delight belonging to that nation's external kinds of love, and the consequent desire of their interiors to celebrate. This is clear from the meaning of 'the calf' as the delight belonging to that nation's external kinds of love, dealt with above in 10407, the reason why worship in keeping with that delight is meant here being that when Moses came near the camp that nation was engaged in such worship (that worship, as is clear from what has been shown above, has its origin in hell); and from the meaning of 'the dances' as desire of the interiors to celebrate, also dealt with above, in 10416.