'Midwives,' as in Exodus 1:15-21, signify receptions of truth in the natural principle. 'A midwife,' as in Genesis 26, signifies the natural level.

(References: Arcana Coelestia 4588, Genesis 1, 15)

'Onan,' as in Genesis 38, describes the evil from the falsity of evil which was later prominent among the Jewish peoples.

(References: Arcana Coelestia 4837)