Luke 21:29-33

Then He told them a parable: “Look at the fig tree and all the trees; [Matt 24:32, 33; Mark 13:28, 29] as soon as they put out leaves, you see it and know for yourselves that summer is near. So you too, when you see these things happening, know [without any doubt] that the kingdom of God is near. I assure you and most solemnly say to you, this generation [those living at that definite period of time preceding the second coming] will not pass away until everything takes place. Heaven and earth will pass away, but My words will not pass away.