Genesis 12:10 Now there was a famine in the land. So Abram went down to Egypt to sojourn there, for the famine was severe in the land. When he was about to enter Egypt, he said to Sarai his wife, “I know that you are a woman beautiful in appearance, and when the Egyptians see you, they will say, ‘This is his wife.’ Then they will kill me, but they will let you live. Say you are my sister, that it may go well with me because of you, and that my life may be spared for your sake.” When Abram entered Egypt, the Egyptians saw that the woman was very beautiful. And when the princes of Pharaoh saw her, they praised her to Pharaoh. And the woman was taken into Pharaoh’s house. And for her sake he dealt well with Abram; and he had sheep, oxen, male donkeys, male servants, female servants, female donkeys, and camels. But the LORD afflicted Pharaoh and his house with great plagues because of Sarai, Abram’s wife. So Pharaoh called Abram and said, “What is this you have done to me? Why did you not tell me that she was your wife? Why did you say, ‘She is my sister,’ so that I took her for my wife? Now then, here is your wife; take her, and go.” And Pharaoh gave men orders concerning him, and they sent him away with his wife and all that he had.
“And the Lord plagued Pharaoh.” The mode of the divine interference is suited to have the desired effect on the parties concerned. As Pharaoh is punished, we conclude he was guilty in the eye of heaven in this matter. He committed a breach of hospitality by invading the private abode of the stranger. He further infringed the law of equity between man and man in the most tender point, by abstracting, if not with violence, at least with a show of arbitrary power which could not be resisted, a female, whether sister or wife, from the home of her natural guardian without the consent of either. A deed of ruthless self-will, also, is often rendered more heinous by a blamable inattention to the character or position of him who is wronged. So it was with Pharaoh. Abram was a man of blameless life and inoffensive manners. He was, moreover, the chosen and special servant of the Most High God. Pharaoh, however, does not condescend to inquire who the stranger is whom he is about to wrong; and is thus unwittingly involved in an aggravated crime. But the hand of the Almighty brings even tyrants to their senses. “And his house.” The princes of Pharaoh were accomplices in his crime Genesis 12:15, and his domestics were concurring with him in carrying it into effect. But even apart from any positive consent or connivance in a particular act, men, otherwise culpable, are brought into trouble in this world by the faults of those with whom they are associated. “On account of Sarai.” Pharaoh was made aware of the cause of the plagues. (Barnes)
Pharaoh had discovered in the plague the wrath of the God of Abraham, he did not venture to treat him harshly, but rather sought to mitigate the anger of his God, by the safe-conduct which he granted him on his departure. But Abram was not justified by this result, as was very apparent from the fact, that he was mute under Pharaoh’s reproofs, and did not venture to utter a single word in vindication of his conduct, as he did in the similar circumstances described in Genesis 10:11-12. The saving mercy of God had so humbled him, that he silently acknowledged his guilt in concealing his relation to Sarah from the Egyptian king. (Keil and Delitzsch )
It would appear from this section of Scripture that Abraham, known for his acts of faith, did not exercise faith in this instance. Scripture says that we learn, grow, and mature line upon line, precept upon precept, here a little and there a little. In times when our faith is lacking God remains faithful and like in this case may perform signs, wonders, and acts that are in line with His faithfulness overshadowing our lack of faith. If we have any mind at all we more than likely can recall past times of our own lack of faith and unbelief in God, His Power, Might, and Love over a situation or trial we are expecting or current in. I have to think that this time for Abraham was a learning one, a time when his faith grew, not out of his faithfulness but out of God’s.
Let our hearts grow and mature in knowledge and understanding of the mighty power and sovereignty of God over all of creation – and whatever situation we are expecting or currently in.