Bhagavad Gita 17.10यातयामं गतरसं पूति पर्युषितं च यत्।उच्छिष्टमपि चामेध्यं भोजनं तामसप्रियम् ॥

Cannabis indica (Ganja), Bhang, opium, cocaine, Charas, Chandoo, all stale and putrid articles, are Tamasic.Yatayamam Stale, literally means cooked three hours ago. Yatayamam and Gatarasam mean the same thing.Paryushitam Rotten The cooked food which has been kept overnight.Uchchishtam What is left on the plate after a meal.The man whose taste is of a Tamasic nature will eat food in the afternoon that has been cooked on the previous day. He also likes that which is halfcooked or burnt to a cinder. He and all the members of his family sit together and eat from the same dish or plate, food that has been mixed into a mess by his children.The food eaten by Tamasic people is stale, dry, without juice, unripe or overcooked. They do not relish it, till it begins to rot and ferment. They take prohibited foods and drinks. They take liors, fermented toddy, etc. They are horrible people with devilish tendencies.