John 8:17

And in your law also it has been written, 'The testimony of two men is true.'

but, if he hear you not, take with you yet one or two, that at the mouth of two witnesses or three, every word may be established.

Jesus answered them, "Has it not been written in your law, 'I said, ye are gods?'

but this they do, that the word may be fulfilled, which has been written in their law, 'They hated Me without a cause.'

This is the third time I am coming to you. At the mouth of two witnesses, and of three, shall every word be established.

So that the law has become our tutor to lead us to Christ, that we might be justified by faith.

Tell me, ye who are wishing to be under law, do ye not hear the law?

Anyone, having set aside Moses' law, dies without mercy on the testimony of two or three witnesses;

If we receive the testimony of men, the testimony of God is greater; because this is the testimony of God, that He hath testified concerning His Son.

And I will give to My two witnesses, and they shall prophesy a thousand two hundred and sixty days, clothed in sackcloth."

Treasury of Scripture Knowledge

It is also written in your law, that the testimony of two men is true.