So did Abraham. Genesis 20:5. See also Genesis 12:13. Reader! do not hastily pass over this verse; but remark, in the perusal, the weakness of the patriarch's faith. Was it not enough that the Lord had appeared unto him, had assured him of his remembrance, of his covenant engagements, and that he would bless him: nay, that his dwelling in Gerar was by the express command of God. Could Isaac doubt of God's protection after this, and could he suppose that he would want means effectually to secure the chastity of his wife, so that he must descend to the pitiful conduct of dissembling? Alas! what do we see in this history of Isaac, but another evidence of what our poor faithless and unbelieving nature is, in the midst of all God's assurances of his love.
Related Commentaries of Genesis 26:5
Genesis 26:5-7
5 Because that Abraham obeyed my voice, and kept my charge, my commandments, my statutes, and my laws.
6 And Isaac dwelt in Gerar:
7 And the men of the place asked him of his wife; and he said, She is my sister: for he feared to say, She is my wife; lest, said he, the men of the place should kill me for Rebekah; because she was fair to look upon.