Matthew 26:3
Then the leading priests and elders of the [Jewish] people were gathered in the courtroom of the head priest, named Caiaphas.
Matthew 27:1
Now when morning came, all the leading priests and the elders of the [Jewish] people conferred together against Jesus as to how they might put Him to death.
John 18:1
After Jesus had said these things He went out with His disciples across the Kidron valley. [Note: This was a "wadi," or dry creek bed which carried a torrent of water during the rainy season. It ran parallel with the east wall of Jerusalem, between the city and the Mount of Olives]. There was an [olive] orchard there and Jesus and His disciples went into it.