It is narrated from Sayyiduna Abu Burdah that once he performed the sacrifice before the Prophet (ﷺ) had done so. The Prophet (ﷺ) ordered him to sacrifice again. He said, "Now I have only a six-month-old lamb." The Prophet (ﷺ) ordered him to slaughter that one.
Hadith Referenceمسند احمد / مسند المكيين / 15830
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن إن صح سماع بشير بن يسار من أبى بردة