Sunan an-Nasa'i 4430

It was narrated from Ibn Buraidah that his fhater said:"The Messenger of Allah said: "I used to forbid you (from eating) the meat of sacrificial animals after three days, and to (make) Nadidh except in a water skin, and to visit graves. But now eat whatever you want of the meat, or take some with you (when traveling) or store it: and whoever wants to visit graves, it will remind him of the Hereafter; and drink, but beware of any kind of intoxicant."' (Sahih)