Mark 13:4
"Tell us when this is to happen, and what the sign will be when it is all just going to be carried out."
Acts 1:6-7
So those who were present asked him, "Master, is this the time when you are going to re-establish the kingdom for Israel?"
Matthew 24:3
As he was sitting on the Mount of Olives, the disciples came up to him by themselves, and said to him, "Tell us when this is to happen, and what will be the sign of your coming, and of the close of the age."
Luke 21:7
Then they asked him, "Master, when will this happen, and what will be the sign that it is going to take place?"
John 21:21-22
When Peter saw him, he said to Jesus, "But, Master, what about him?"