Musnad Abu Ya'la al-Mawsili 217:2

Ibrahim ibn Muhammad ibn ‘Ar‘arah narrated to us, Wahb ibn Jarir narrated to us, my father narrated to us, he said: I heard Muhammad ibn Ishaq narrating from Muhammad ibn ‘Abd Allah, from Muhammad ibn ‘Abd al-Rahman, from ‘Ubayd Allah ibn Abi Rafi‘, from Maymunah, who said: I heard the Messenger of Allah (may Allah bless him and grant him peace) say: "My nation will continue to be in goodness, with its affairs held together, as long as the children of adultery do not appear among them. But if they appear, I fear that Allah will cover them all with a punishment."