The below shows that if one keeps in his sin and never seeks repentance to not call on God when he has chance to remain so he will eventually die unexpectedly at a time he is not repenting not watching without having chance to repent.
Ecclesiastes 8:11-13
11 Because the sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil. 12 Though a sinner does evil a hundred times, and his days are prolonged, yet I surely know that it will be well with those who fear God, who fear before Him. 13 But it will not be well with the wicked; nor will he prolong his days, which are as a shadow, because he does not fear before God.