Genesis 12:19
Why saidst thou, She is my sister? so I might have taken her to me to wife: now therefore behold thy wife, take her, and go thy way. Why saidst thou, She is my sister? so I might have taken her to me to wife: now therefore behold thy wife, take her, and go thy way.
This rebuke belongs to Abraham's trial when severe famine came in the land and he went down into Egypt. Pharaoh confronted him after learning that Sarah was his wife, charged him that calling her his sister had nearly led to taking her as wife, and commanded him to take his wife and go his way. The confrontation shows that God had guarded the royal household from committing a great sin. It also shows that Abraham's want of faith had placed Sarah in peril.
His sojourn in Egypt was one of the places where his life made God known to those around him by faithfulness and character. The record proves that even a man charged with great responsibility and favored by God can give way to temptation and do wrong. In Egypt God gave him favor with the Egyptians, so that he came out with more than he had when he went in.
The keeping of this failure in Scripture stands as a warning and instruction to later generations. Those who believe and yet fall may take courage again and by God's grace rise above their evil nature and press on in the conflict.