Jesus Christ said,

"No one knows about that day or hour, not even the angels in heaven, nor the Son, but only  the Father."                     (Matthew 24:36). 

"Be on guard! Be alert! You do not know when that time will come." (Mark 13:33).

"Therefore keep watch, because you do not know the day or the hour." (Matthew 25:13).

They (the Scoffers) will say, "Where is this 'coming' He promised?

Even since our fathers died, everything goes on as it has since the beginning of creation." (2 Peter 3:4).

For the revelation awaits an appointed time; it speaks of the end and will not prove false.

Though it linger, wait for it; it will certainly come  ....(Habakkuk 2:3).

He will  appear a second time, not to bear sin but to bring salvation to those who are waiting for Him.                                  (Hebrews 9:28).

As surely as the sun rises, He will  appear;...(Hosea 6:3).

Jesus Christ said, "And this gospel of the kingdom will be preached in the whole world as a testimony to all nations, and then the end will come." (Matthew 24:14).

Jesus said, "Behold I  am coming soon!..." (Revelation 22:7).