John Chrysostom

"The same dealt subtly with our kindred, and evil-entreated our fathers, that they should cast out their young children, to the end they might not live." "Dealt subtly:" he hints at their not liking to exterminate them openly: "that they should cast out their young children," it says.

Homily on Acts 16 ↗

Theophylact of Ohrid

"Forcing… to cast out their young children, to the end they might not live." This expression hints that the king did not want the killing of the infants to be carried out openly. And observe: the promise of God was strengthened by the very same circumstances through which the devil strove to undermine it, because the people of Israel were being afflicted, yet they grew and multiplied. …

Commentary on Acts ↗

Oecumenius

But even at the time when deliverance for the afflicted was drawing near, the arrogance of the oppressors, having increased, introduced destruction of the males by the midwives. Moreover, as to the other evils it chiefly led to an increase in the number of the afflicted, here, in order to condemn the crimes, it unexpectedly rescues even Moses, who was to destroy them, and esteems him worthy of royal nurture and care. Why was this also mentioned? …

Commentary on Acts ↗