Silsilat al-Ahadith al-Sahihah

Sayyiduna Abu Amir or Sayyiduna Abu Malik Ash'ari (may Allah be pleased with him) heard the Messenger of Allah (peace and blessings be upon him) say: "There will be people in my Ummah who will consider adultery, silk, alcohol, and musical instruments to be lawful and permissible. Some groups will camp at the foot of a high mountain; in the evening, a shepherd will come to them with his livestock for some need, but they will say: (Go back today) come tomorrow. Allah Almighty will destroy them and cause the mountain to fall upon them, and He will transform others into the forms of monkeys and pigs until the Day of Resurrection."