Jesus told his disciples about the distressing things that would happen before his return.

Matthew 24:3-14

3 Later, as Jesus was sitting alone on the slope of Olive Tree Hill, we disciples went to him and asked him, “When will this happen to the buildings of the Temple? Also, tell us what will happen to indicate that you are about to come again, and to indicate that this world is ending?”

4 Jesus replied, “All that I will say is, be sure that no one deceives you about what will happen 5 Many people will come and say ◄that I sent them/that they have my authority► [MTY]. They will say, ‘I am the Messiah’, and they will deceive many people. 6 You will hear about wars that are close and wars that are far away, but do not let that trouble you. Keep in mind that God has said that those things must happen. But when they happen, it will not mean that the end of the world has come! 7 Groups in various countries will fight each other, and various governments will also fight against each other. There will be famines and earthquakes in various places. 8 These things will happen first. Then there will be other things that will happen before I return. What will happen will be like the first pains of childbirth [MET].

9 At that time people who oppose you will take you to the authorities, who will mistreat you and kill you. You will be hated by people who live in all nations [PRS] {People who live in all nations [PRS] will hate you} because you believe in me [MTY]. 10 Also, many people will stop believing in me because of the way they will suffer. They will betray each other and will hate each other. 11 Many will come saying that they are prophets, but they will be lying, and they will deceive many people. 12 Because there will be more and more people who will disobey God’s laws [PRS], many people will no longer [MET] love their fellow believers [PRS]. 13 But all those who keep on believing in me to the end of their lives will be saved. 14 Furthermore, the good message about my ruling over people’s lives will be preached in every part of the world, in order that people of all ethnic groups may hear it. Then the end of the world will come.”