It is narrated from Hazrat Uqbah bin Aamir (may Allah be pleased with him) that once the Prophet (peace and blessings of Allah be upon him) distributed sacrificial animals among his companions, and a six-month-old lamb came to my share. I asked the Prophet (peace and blessings of Allah be upon him) about the ruling of sacrificing it, so the Prophet (peace and blessings of Allah be upon him) said, "You may sacrifice it."
Hadith Referenceمسند احمد / مسند الشاميين / 17424
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد قوي