Genesis 12:11
And it came to pass, when he was come near to enter into Egypt, that he said unto Sarai his wife, Behold now, I know that thou art a fair woman to look upon: And it came to pass, when he was come near to enter into Egypt, that he said unto Sarai his wife, Behold now, I know that thou art a fair woman to look upon:
Abraham's words to Sarai belong to his going down into Egypt when severe famine lay upon the land, and that removal was another trial for him. God gave him favor with the Egyptians, so that when he came out of Egypt he possessed more than he had possessed when he went in. His time in Egypt also shows how his conduct and presence helped to reveal God to the people among whom he lived, for his fidelity and character served as a light to the nations of his sojourn.
The verse stands within the truthful record of his sin and failure under temptation, preserved as a lesson and warning for later generations. It shows that even one favored by God, entrusted with great responsibilities, and faithful can sin, waver, struggle, and fall. It encourages readers that through God's grace they can rise again, take heart, overcome, and continue the struggle.