Arcana Coelestia #707
707. From here down to verse 5 the details are almost identical with those stated in the previous chapter, with only minor changes; and the same applies to what comes after that. Anyone who is not aware of the internal sense of the Word is bound to conclude that it is mere repetition of the same thing. Similar instances occur in other parts of the Word, especially the Prophets, where the same matter is expressed in other and different words. And sometimes the matter is taken up again and described once more. The reason for this, as stated already, is that the two faculties with man of will and understanding are totally different from each other, and that the Word deals with both separately. This is the reason why repetitions exist. That the same applies here will be clear from what follows.
Leviticus 14:7-8
7
And he shall sprinkle upon him that is to be cleansed from the leprosy seven times, and shall pronounce him clean, and shall let the living bird loose into the open field.
8
And he that is to be cleansed shall wash his clothes, and shave off all his hair, and wash himself in water, that he may be clean: and after that he shall come into the camp, and shall tarry abroad out of his tent seven days.