It is narrated from Sayyiduna Salman bin Amir al-Dabbi (may Allah be pleased with him) as a marfu' narration that he (peace and blessings be upon him) commanded the aqiqah at a child's birth and said: "Shed blood on his behalf and remove the harm from him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19259