Musannaf Ibn Abi Shayba 27:546

Jarir narrated to us, from Mughira, from al-Sha'bi, who said: When the Messenger of Allah, may Allah bless him and grant him peace, intended to perform the *li'an* (imprecation) with the people of Najran, he took the hand of al-Hasan and al-Husayn, while Fatima was walking behind him.