Hebrews 9:26-28

for then he would have had to suffer many times ever since the creation of the world. Instead, now when all ages of time are nearing the end, he has appeared once and for all, to remove sin through the sacrifice of himself. Everyone must die once, and after that be judged by God. In the same manner Christ also was offered in sacrifice once to take away the sins of many. He will appear a second time, not to deal with sin, but to save those who are waiting for him.