Arcana Coelestia #1402
1402. The things that are stated regarding Abram's sojourn in Egypt represent and mean the instruction which the Lord received first, 'Abram' being the Lord, 'Sarai as a wife' truth that was to be allied to the celestial, 'Sarai as a sister' intellectual truth, and 'Egypt' knowledge. An advance from factual knowledge right on to celestial truths is described, which was made in accordance with Divine order, to the end that the Lord's Human Essence might be joined to the Divine Essence, and at the same time become Jehovah.
Arcana Coelestia #6727
6727. 'And his sister stood at a distance, to know what would happen to him' means the Church's truth far away from there, and observation. This is clear from the meaning of 'sister' as rational truth, dealt with in 1495, 2508, 2524, 2556, 3160, 3386, thus the Church's truth, for this is rational truth; and from the meaning of 'to know what would happen' as observation.