حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، لَمْ يَكُنْ يَسْأَلُهُ أَحَدٌ مِنْ أَهْلِهِ عَقِيقَةً إِلاَّ أَعْطَاهُ إِيَّاهَا وَكَانَ يَعُقُّ عَنْ وَلَدِهِ بِشَاةٍ شَاةٍ عَنِ الذُّكُورِ وَالإِنَاثِ ‏.‏

Yahya related to me from Malik from Nafi that if any of Abdullahibn Umar's family asked him for an aqiqa, he would give it to them. Hegave a sheep as aqiqa for both his male and female children. Translation Not Available

Book Ref: Muwatta Imam Malik Book 26 Hadith 1073
Web Ref:  Muwatta Imam Malik Book 26 Hadith 4