Pasupata Toga1 - Verse 32-34

A Yogi should not practice concentration near fire, in the forest, over a heap of dry leaves, in a place infested with 96 Vayu Puran a low creatures (or a crowded place) , in a cremation ground, in a dilapidated cowshed, at the cross-roads (where four ways meet) , in a noisy or terrifying place, near a tomb (or a Buddhist or Jain shrine) or a place full of ant-hills, near a well or a liver, for these are places of disturbance. Nor should he do so when overwhelmed with hunger, displeasure or excitement. He should however practice Yoga diligently and with concentration.