Musannaf Ibn Abi Shayba 19:283

Abu Bakr narrated to us, he said: Abd al-Wahhab narrated to us, from Sa’id ibn Abi ‘Aruba, from Farqad al-Sabkhi, that a man said to another man, "O Lut-like (Luṭī)!" So he asked al-Hasan and Muhammad, and they both said: "There is no prescribed punishment (hadd) upon him." And al-Hasan said: "Unless he says, 'You perform the deed of the people of Lut.'"