There are so many examples of this but here is one, Jerusalem Talmud Sanhedrin 2:6 it says towards the end:
Rebbi Simeon ben Ioḥai stated: The book Deuteronomy ascended, bowed down before the Holy One, praise to Him, and said to Him: Master of the Universe, You wrote in Your Torah that any disposition which is partially invalid is totally invalid, and now Solomon wants to uproot a י from me! The Holy One, praise to Him, said to it: Solomon and a thousand like him will disappear but nothing from you will disappear.
The question is did Hashem actually say that? Was there a Navi who received that word of Hashem? Was it Rabbi Shimon bar Yochai who heard it from Hashem or an angel or a bat kol? Or are they merely saying that Hashem would say something like that? There is clearly a heavy weight with the word of Hashem, is it applied to the above example? Is this counted as someone who is speaking in the name of Hashem? How does this relate to Deuteronomy 18:18-22? Is this applying the weight of Hashem's word without any of the responsibility of the one who speaks in the name of Hashem?