Musannaf Ibn Abi Shayba 27:210

Abu Mu'awiyah narrated to us, he said: Al-A'mash narrated to us, from Al-Minhal, from Sa'id ibn Jubayr, from Ibn Abbas regarding His saying: "Do not be like those who annoyed Moses, but Allah cleared him of what they said, and he was honorable before Allah." He said: His people said to him, "He has a scrotal hernia." He said: So he went out one day to bathe, and he placed his clothes on a rock. The rock began to run with his clothes, and he went out following it, naked, until it reached the gatherings of the Children of Israel. He said: So they saw him, and he did not have a scrotal hernia. He said: That is His saying: "But Allah cleared him of what they said, and he was honorable before Allah."