Psalm 39:4 LORD, make me to know mine end, and the measure of my days, what it is; that I may know how frail I am.
1 Thessalonians 5:3-4 For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape. But ye, brethren, are not in darkness, that that day should overtake you as a thief.
James 4:14 Whereas ye know not what shall be on the morrow. For what is your life? It is even a vapour, that appeareth for a little time, and then vanisheth away.