John 1:18

No one has ever seen God [i.e., His full splendor], but God, the only conceived [and eventually born Son], who is at the Father's side, has shown us who He is.

John 5:37

And the Father who sent me testifies concerning me. You people have never heard His voice nor seen His form.

Treasury of Scripture Knowledge

Summary

And Manoah said unto his wife, We shall surely die, because we have seen God.

General references

Bible References

We have

John 1:18
No one has ever seen God [i.e., His full splendor], but God, the only conceived [and eventually born Son], who is at the Father's side, has shown us who He is.
John 5:37
And the Father who sent me testifies concerning me. You people have never heard His voice nor seen His form.

General references

Matthew 17:6
And when the disciples heard [the voice], they fell [to the ground] on their faces and became very afraid.