Musnad Ahmad 1167:38

'Abd al-A'la narrated to us, from Ma'mar, from 'Abd Allah ibn Muslim ibn Shihab, the brother of al-Zuhri, from a freed slave of Asma', from Asma' bint Abi Bakr, that the Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever among you believes in Allah and the Last Day..." and he mentioned the rest of the hadith.