In Exodus 30:12, this signifies all things of the church. (Arcana Coelestia 10216)

6691. Verse 22 And Pharaoh commanded all his people, saying, Every son who is born you shall throw into the river, and every daughter you shall keep alive.

'And Pharaoh commanded all his people' means a general influx into factual knowledge opposed to the Church's truths. 'Saying, Every son who is born you are to throw into the river' means that all truths that appeared should be drowned in falsities. 'And every daughter you shall keep alive' means that they should not attack good.