Musannaf Ibn Abi Shaybah

Hazrat Ibn Musayyib and Hasan state that a Muslim can marry four women from the People of the Book.

Hazrat Mujahid says that a Muslim can marry four women from among the People of the Book.

Hazrat Zuhri says that a free man can have four slave women or four Christian women in marriage at the same time. The same ruling applies to a slave.