Arcana Coelestia # 8075
8075. 'And all offspring opening it among the beasts' means all charity belonging to the new birth. This is clear from the meaning of 'whatever opens the womb' as faith springing from charity, which belongs to the new birth, dealt with in 8043; and from the meaning of offspring of the beasts' as the affection for good, dealt with in 45, 46, 142, 143, 246, 714, 715, 719, 776, 1823, 2179, 2180, 3218, 3519, 5198, thus the good of charity.
Arcana Coelestia # 7838
7838. 'A male' means which is characteristic of faith rooted in charity. This is clear from the meaning of 'a male' as the truth of faith, dealt with in 2046, 4005, and so faith rooted in charity, since the truth of faith is not the truth of faith unless it exists together with the good of charity, and springs from that good most of all. The reason why the Passover animal had to be a male was that that animal was a sign of the innocence of those belonging to the spiritual Church. And those belonging to the spiritual Church possess no other kind of good than that which is in itself the truth of faith; for this is called good when from charitable affection it is put into action, 7835. This is why it had to be a male animal. At other times female animals were also used in sacrifices, when worship springing from good was to be represented.