Acts 4:23

And being let go, they came to their own company, and reported all that the chief priests and the elders had said unto them.

Having been threatened by the hierarchy, the apostles might have been expected, by those who threatened, to flee from the area; but instead, they, together with the whole Christian community, went to their knees in prayer to Almighty God. No, they would not flee - yet. The battle for the soul of secular Israel would be continued for forty years; THEN the Christians would flee from Jerusalem, and the accumulated wrath of centuries would humble forever that city which rejected Jesus.