Arcana Coelestia # 3083
3083. 'And filled her pitcher' means vessels for receiving. This is clear from the meaning of 'a pitcher' in the internal sense, since it is a vessel able to receive water, as a recipient of cognitions of truth, also of truth itself, which are meant by 'water'. For 'water' in the internal sense means cognitions, and also truth, see 28, 680, 2702, 3058.
Swear
In Genesis 21:23, this signifies affirmation.
The Lord swearing by himself signifies that divine truth testifies, for He is divine truth itself, and this testifies from itself and means itself. It says 'Jehovah swears' because the children of Israel had a representative church, and so the Lord's conjunction with the church was represented in a covenant similar to two people swearing their trust. This is why swearing was used to seal a covenant or deal. When 'Jehovah swears' it does not mean that He really did swear, but that divine truth testifies or bears testimony to the things asserted.
(Odkazy: Apocalypse Revealed 474)