b. Baba Metzia 59a-b

...R. Eliezer declared it clean, and the Sages declared it unclean; and this was the oven of ‘Aknai... It has been taught: On that day R. Eliezer brought forward every imaginable argument, but they did not accept them.

He said to them: “If the halachah agrees with me, let this carob-tree prove it!” Then, the carob-tree was torn a hundred cubits out of its place (others even say four hundred cubits). “No proof can be brought from a carob-tree,” they answered.

Again he said to them: “If the halachah agrees with me, let the stream of water prove it!” At that moment, the stream of water flowed backwards. “No proof can be brought from a stream of water,” they rejoined.

Again he urged: “If the halachah agrees with me, let the walls of the schoolhouse prove it,” and the walls inclined to fall. But R. Joshua rebuked them (i.e. the walls), saying: “When scholars are engaged in a halachic dispute, who are you to interfere?” Hence they did not fall, in honour of R. Joshua. But neither did they resume the upright, in honour of R. Eliezer. So to this day, they are still standing inclined.

Again he said to them: “If the halachah agrees with me, let it be proved from Heaven!” Whereupon a Heavenly Voice cried out: “Why do you dispute with R. Eliezer, seeing that in all matters the halachah agrees with him!” But R. Joshua arose and exclaimed: ‘It is not in heaven!”

What did he mean by this? R. Jeremiah said: “[He meant that] the Torah had already been given at Mount Sinai. We pay no attention to a Heavenly Voice, because You have written in the Torah at Mount Sinai: ‘After the majority must one incline.’”

R. Nathan met Elijah and asked him: “What did the Holy One, Blessed be He, do in that hour? — He laughed! He replied, saying, ‘My sons have defeated Me, My sons have defeated Me!’”