New Revised Standard Version
He said, “See, I am old; I do not know the day of my death.

Contemporary English Version
Isaac replied, "I am old and might die at any time.

New American Bible
Isaac then said, “Now I have grown old. I do not know when I might die.

Douay-Rheims Bible
And his father said to him, Thou seest that I am old, and know not the day of my death.

And his father said to him, Thou seest that I am old, and know not the day of my death.

I know not.

Genesis 48:21 And he said to Joseph, his son: Behold I die, and God will be with you, and will bring you back into the land of your fathers.

1 Samuel 20:3 And he swore again to David. And David said: Thy father certainly knoweth that I have found grace in thy sight, and he will say: Let not Jonathan know this, lest he be grieved. But truly as the Lord liveth, and thy soul liveth, there is but one step (as I may say) between me and death.

Proverbs 27:1 Boast not for to morrow, for thou knowest not what the day to come may bring forth.

Ecclesiastes 9:10 Whatsoever thy hand is able to do, do it earnestly: for neither work, nor reason, nor wisdom, nor knowledge shall be in hell, whither thou art hastening.

Isaiah 38:1,3 In those days Ezechias was sick even to death, and Isaiah the son of Amos the prophet cane unto him, and said to him: Thus saith the Lord: Take order with thy house, for thou shalt die, and not live. . . .

Mark 13:35 Watch ye therefore (for you know not when the lord of the house cometh, at even, or at midnight, or at the cock crowing, or in the morning):

James 4:14 Whereas you know not what shall be on the morrow.