Hadith
وَحَدَّثَنِي مَالِكٌ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّهُ أَعْتَقَ وَلَدَ زِنًا وَأُمَّهُ .
Malik related to me from Nafi that Abdullah ibn Umar freed an illegitimate child and its mother
Sahih · Salim al-Hilali
Muwatta Malik 1478 ·Book 38, Hadith 15·Also available on sunnah.com·