Jesus told his disciples that they would live to see “the Son of Man” come in the clouds and the world would end. Jesus was later executed and of course he never came back and of course the world never ended. The disciples all died almost 2000 years ago.

(Mat 24:3 NRSV) When he was sitting on the Mount of Olives, the disciples came to him privately, saying, “Tell us, when will this be, and what will be the sign of your coming and of the end of the age?”
(Mat 24:27 NRSV) For as the lightning comes from the east and flashes as far as the west, so will be the coming of the Son of Man.

(Mat 24:30 NRSV) Then the sign of the Son of Man will appear in heaven, and then all the tribes of the earth will mourn, and they will see ‘the Son of Man coming on the clouds of heaven’ with power and great glory.

(Mat 24:34 NRSV) Truly I tell you, *this generation will not pass away* until all these things have taken place.

(Mat 16:28 NRSV) Truly I tell you, there are some standing here who will not taste death before they see the Son of Man coming in his kingdom.”