John 18:2

(Now Judas, the one who betrayed him, also knew about the place, because Jesus often gathered there with his disciples.)

Luke 21:37

So [throughout] the days he was teaching in the temple [courts], and [throughout] the nights he was going out [and] spending the night on the hill that is called [the Mount] of Olives.

Luke 22:39

And he went away [and] proceeded, according to [his] custom, to the Mount of Olives, and the disciples also followed him.

Mark 11:11-12

And he went into Jerusalem to the temple, and [after] looking around at everything, [because] the hour was already 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
And he went into Jerusalem to the temple, and [after] looking around at everything, [because] the hour was already late, he went out to Bethany with the twelve.
Luke 21:37
So [throughout] the days he was teaching in the temple [courts], and [throughout] the nights he was going out [and] spending the night on the hill that is called [the Mount] of Olives.
Luke 22:39
And he went away [and] proceeded, according to [his] custom, to the Mount of Olives, and the disciples also followed him.

General references

Mark 14:42
Get up, let us go! Behold, the one who is betraying me is approaching!"