“This is the finger of God,” the magicians said to Pharaoh. But Pharaoh’s heart was hardened, and he would not listen to them, just as the LORD had said.
19. Then the magicians said unto Pharaoh. It is probable that they were reproved harshly, because they had come to a stop in their rivalry with the servants of God; wherefore they excuse themselves by saying, that there is no more room for their wisdom and magical arts.
Here is a short account of the plague of lice. It does not appear that any warning was given of it before. Pharaoh's abuse of the respite granted to him might have been a sufficient warning to him to expect another plague: for if the removal of an affliction harden us, and so we lose the benefit of it, we may conclude it goes away...
Commenting on Exodus 8:16-19
And the Lord said unto Moses, rise up early in the morning,.... Of the day following, the twenty eight of Adar, or February, according to Bishop Usher; this was the fittest time to meet with Pharaoh, and the most likely to make impressions on him: and stand before Pharaoh: meet him as he comes along, and stop him, and stand before him as having something...