Muhammad bin Sirin said to me, "Ask al-Hasan from whom he heard his hadith on the aqiqah." So I asked him about it, and he replied, "I heard it from Samura."
أخبرنا هارون بن عبد الله قال حدثنا قريش بن أنس
لي محمد بن سيرين سل الحسن ممن سمع حديثه في العقيقة فسألته عن ذلك فقال سمعته من سمرة
No references are available.
Bukhari, Aqiqah, chapter on removing dirt from the child at the aqiqah, no. 5472, from the hadith of Quraysh bin Anas, and it is also in Kubra, no. 4547.