John 5:31
“If I testify about myself, my witness is not valid.
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John 5:19
Jesus therefore answered them, “Most certainly, I tell you, the Son can do nothing of himself, but what he sees the Father doing. For whatever things he does, these the Son also does likewise.
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John 5:37
The Father himself, who sent me, has testified about me. You have neither heard his voice at any time, nor seen his form.
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John 5:39
“You search the Scriptures, because you think that in them you have eternal life; and these are they which testify about me.
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