Hadith 12:39
Ibn 'Abbas (RAA) narrated, "The Messenger of Allah (ﷺ) slaughtered a ram for both al-Hasan and al-Husain (at their birth).' Related by Abu Dawud, Ibn Khuzaimah, Ibn al-Garud and 'Abdul Haqq graded it as Sahih.
عَنِ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا; { أَنَّ اَلنَّبِيَّ - صلى الله عليه وسلم -عَقَّ عَنْ اَلْحَسَنِ وَالْحُسَيْنِ كَبْشًا كَبْشًا } رَوَاهُ أَبُو دَاوُدَ, وَصَحَّحَهُ اِبْنُ خُزَيْمَةَ, وَابْنُ اَلْجَارُودِ, وَعَبْدُ اَلْحَقّ ِ (1777)