Genesis 26:9

So Abimelech summoned Isaac and said, 'She is really your wife! Why did you say, 'She is my sister'?' Isaac answered him, 'Because I thought I might lose my life on account of her.'

(New International Version)

Then Abimelech called Isaac and said, 'Behold, certainly she is your wife! How then did you say, 'She is my sister'?' And Isaac said to him, 'Because I said, 'I might die on account of her.''

(New American Standard Bible)

And Abimelech called Isaac, and said, Behold, of a surety she is thy wife: and how saidst thou, She is my sister? And Isaac said unto him, Because I said, Lest I die for her.

(King James Version)