From Sahih Muslim (Hadith 3340):
Abd al-Rahman reported on the authority of his father Abu Sa'id (Allah be pleased with him) that he heard Allah's Messenger (ﷺ) as saying:I have declared sacred what is between the two lava grounds of Medina just as Ibrahim (peace be upon him) declared Mecca as sacred. He (the narrator) then said: Abu Sa'id caught hold of (Abu Bakr, another narrator, used the word" found" ) a bird in his hand and then released it from his hand and set it free
Reference: Muslim 3340