From Sahih Muslim (Hadith 5622):
Anas b. Malik reported that Allah's Messenger (ﷺ) had the sublimest character among mankind. I had a brother who was called Abu 'Umair. I think he was weaned. When Allah's Messenger (may peace he upon him) came to our house he saw him, and said:Abu 'Umair, what has the sparrow done? He (Anas) said that he had been playing with that
Reference: Muslim 5622