Arcana Coelestia #3045
3045. 'And the servant put his hand under the thigh of Abraham his master' means that the natural man was bound, as regards its power, to the good of conjugial love. This is clear from what has been stated in 3021, where also the same words occur.
Eye-salve
In Revelation 3:18, this signifies spiritual means to heal the understanding truths and become wise. (Apocalypse Revealed 214, 245)