It is narrated from Hazrat Anas (may Allah be pleased with him) that once I brought a child—who was born at my mother's place—to the service of the Prophet (peace and blessings be upon him), and saw that the Prophet (peace and blessings be upon him) was branding the ears of goats in the enclosure.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12750