John 5:37

"And the Father himself, which hath sent me, hath borne witness of me. Ye have neither heard his voice at any time, nor seen his shape."

Cross References (ranked by relevance)

John 8:18

I am one that bear witness of myself, and the Father that sent me beareth witness of me.

John 1:18

No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him.

Matthew 3:17

And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.

1 Timothy 1:17

Now unto the King eternal, immortal, invisible, the only wise God, be honour and glory for ever and ever. Amen.

1 Timothy 6:16

Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.

Deuteronomy 4:12

And the LORD spake unto you out of the midst of the fire: ye heard the voice of the words, but saw no similitude; only ye heard a voice.

John 6:27

Labour not for the meat which perisheth, but for that meat which endureth unto everlasting life, which the Son of man shall give unto you: for him hath God the Father sealed.

Matthew 17:5

While he yet spake, behold, a bright cloud overshadowed them: and behold a voice out of the cloud, which said, This is my beloved Son, in whom I am well pleased; hear ye him.

Exodus 20:19

And they said unto Moses, Speak thou with us, and we will hear: but let not God speak with us, lest we die.

John 14:9

Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father?

John 15:24

If I had not done among them the works which none other man did, they had not had sin: but now have they both seen and hated both me and my Father.