Jesus answered him, "I spoke openly to the world. I always taught in synagogues and in the temple, where the Jews always meet, and in secret I have said nothing.
John 18:20
Surrounding context
18:19 The high priest then asked Jesus about His disciples and His doctrine.
18:20 Jesus answered him, "I spoke openly to the world. I always taught in synagogues and in the temple, where the Jews always meet, and in secret I have said nothing.
18:21 Why do you ask Me? Ask those who have heard Me what I said to them. Indeed they know what I said."