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. (ES)
USC-MSA web (English) reference: Book 26, Hadith 4 (ES)
Arabic reference (ES): Book 26, Hadith 1073 (ES)