Arcana Coelestia #2277
2277. That 'He said, I will not do it if I find thirty there' means that they will be saved is clear without explanation from the train of thought in the internal sense.
Genesis 18:4-6
4
Now let a little water be fetched, wash your feet, and rest yourselves under the tree.
5
I will get a morsel of bread so you can refresh your heart. After that you may go your way, now that you have come to your servant." They said, "Very well, do as you have said."
6
Abraham hurried into the tent to Sarah, and said, "Quickly prepare three measures of fine meal, knead it, and make cakes."