John 8:19
Then they said to him, Where is your Father? Jesus answered, You have neither known me nor my Father; if you had known me you would also have known my Father.
John 8:54-55
Jesus answered, If I glorify myself, my glory is nothing; it is my Father who glorifies me, of whom you say, He is our God;
John 16:3
And these things they will do, because they have not known the Father nor me.
John 17:3
And this is the eternal life; that they shall know thee, the only true God, and Jesus Christ whom thou hast sent.
John 17:6
I have manifested thy name to the men whom thou gayest me out of the world; they were thine, and thou gavest them me, and they have kept thy word.
Titus 1:16
They profess to know God, but by works deny him, being abominable and disobedient, and as to every good work reprobate.
1 John 2:3-4
And by this we know that we have known him, if we keep his commandments.