Musnad Abu Ya'la al-Mawsili 6:18

Al-Hasan ibn ‘Umar ibn Shaqiq al-Jarmi narrated to us, Yazid narrated to us, from Khalid, from Abu ‘Uthman, who said: I narrated to Abu Bakrah, and I said: I heard Sa‘d saying—my two ears heard it and my heart retained it from Muhammad, may Allah bless him and grant him peace—: "Whoever claims [to be the son of] someone other than his father in Islam, while he knows that he is not his father, then Paradise is forbidden to him." He [Abu Bakrah] said: And I, my two ears heard it and my heart retained it from Muhammad, may Allah bless him and grant him peace.