John 18:2

Now Judas also, who at that very time was betraying Him, knew the place, for Jesus had often resorted there with His disciples.

Luke 21:37

His habit at this time was to teach in the Temple by day, but to go out and spend the night on the Mount called the Oliveyard.

Luke 22:39

On going out, He proceeded as usual to the Mount of Olives, and His disciples followed Him.

Mark 11:11-12

So He came into Jerusalem and into the Temple; and after looking round upon everything there, the hour being now late He went out to Bethany with the Twelve.

Treasury of Scripture Knowledge

Summary

And Judas also, which betrayed him, knew the place: for Jesus ofttimes resorted thither with his disciples.

General references

Bible References

For

Mark 11:11
So He came into Jerusalem and into the Temple; and after looking round upon everything there, the hour being now late He went out to Bethany with the Twelve.
Luke 21:37
His habit at this time was to teach in the Temple by day, but to go out and spend the night on the Mount called the Oliveyard.
Luke 22:39
On going out, He proceeded as usual to the Mount of Olives, and His disciples followed Him.

General references

Mark 14:42
Rouse yourselves, let us be going: my betrayer is close at hand."