Musannaf Ibn Abi Shayba 19:181

Abu Bakr narrated to us, he said: Abu Khalid al-Ahmar narrated to us, from Yahya ibn Sa'id, from Sa'id ibn al-Musayyib, who said: Abu Sariha and the son of a slave-woman insulted each other. Abu Sariha insulted the son of the slave-woman, so he was flogged.