“When Jesus was sitting
On the Mount of Olives,
The disciples
Came to him privately.
They said.
‘Tell us!
When will this be?
What will be the sign
Of your coming?
What will be the sign
Of the end of the age?’”
Καθημένου δὲ αὐτοῦ ἐπὶ τοῦ ὄρους τῶν Ἐλαιῶν προσῆλθον αὐτῷ οἱ μαθηταὶ κατ’ ἰδίαν λέγοντες Εἰπὲ ἡμῖν, πότε ταῦτα ἔσται, καὶ τί τὸ σημεῖον τῆς σῆς παρουσίας καὶ συντελείας τοῦ αἰῶνος;
There is something similar in Mark, chapter 13:3-4, but it was the named big four apostles, Peter, Andrew, James, and John, who were speaking privately with Jesus, not some disciples. In Luke, chapter 21:7, there is only the vague “they” speaking with Jesus. Only Matthew, here brought up the question of the Parousia (παρουσία) or second coming of Jesus. Jesus was sitting on the Mount of Olives (Καθημένου δὲ αὐτοῦ ἐπὶ τοῦ ὄρους τῶν Ἐλαιῶν), just east of Jerusalem where he could see the Jerusalem Temple. Here, these unnamed disciples came to Jesus privately (προσῆλθον αὐτῷ οἱ μαθηταὶ κατ’ ἰδίαν). They wanted to know when would these things, like the Temple being destroyed, take place (λέγοντες Εἰπὲ ἡμῖν, πότε ταῦτα ἔσται)? What would be the sign that Jesus was coming again in the Parousia (καὶ τί τὸ σημεῖον τῆς σῆς παρουσίας). On top of that, they wanted to know about the end of the world or the completion of the ages (καὶ συντελείας τοῦ αἰῶνος). Matthew combined the destruction of the Jerusalem Temple, the Second coming of Jesus, and the end of the world together.