Mustadrak al-Hakim — Hadith 1403

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "I had forbidden you from visiting graves, from eating the meat of sacrificial animals beyond three days, and from preparing nabidh in certain vessels. Listen! Now visit the graves, for they create detachment from the world and remind of the Hereafter; and eat the meat of sacrificial animals and keep as much of it as you wish. I only forbade you at a time when good things were scarce (due to hardship), so that there would be ease for the people. Listen! No vessel by itself makes anything unlawful; rather, every intoxicant is unlawful."