Musnad Ahmad 31:339

Yahya ibn Adam narrated to us, Ibn al-Mubarak narrated to us, from Usamah, from Muhammad ibn Yahya ibn Habban, from his paternal uncle, from Abu Sa’id al-Khudri, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "I had forbidden you from visiting the graves, so visit them, for in them there is a lesson. And I had forbidden you from *nabidh* (fermented drink), so drink it, but I do not permit any intoxicant. And I had forbidden you from the sacrificial meat (beyond three days), so eat it."