Amr bin Shu'ayb narrates from his father, and he from his grandfather (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "There is no li'an between four kinds of women: (1) a Christian woman married to a Muslim, (2) a Jewish woman married to a Muslim, (3) a slave woman married to a free man, (4) a free woman married to a slave."
Abu al-Hasan al-Daraqutni said: This is Uthman bin Ata al-Khurasani, and he is very weak in hadith; Ibn Bazi' al-Ramli followed him (in narrating it) from Ata al-Khurasani, and he is also da'if (weak).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللعان / 15297