10 To him that smote Egypt in their firstborn … 11 And brought out Israel from among them: for his mercy endureth for ever.
Psalms 136:10-11.
To get Israel out of Egypt, according to this psalm, God had to smite the oppressors, in one night eliminating the first-borns of humans and animals. It was one unforgettable night of colossal lamentations from palace to dungeon. Until Super Power Egypt was thus judged, ironically according to “his mercy [that] endureth for ever,” deliverance for Israel lingered, even though they were the people of God. In other words, some deliverance will never be possible unless, first, by the elimination of the threats to the deliverance, and the threats could be thrones and beasts, with their collateral casualties (Mark 3:27).