Habib bin al-Shahid (may Allah have mercy on him) says: Muhammad bin Sirin (may Allah have mercy on him) said to me: Ask al-Hasan from whom he heard the hadith of the aqiqah. So I asked him, and he said: From Sayyiduna Samurah bin Jundub (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19265