CC Madhya 4.123
ayācita pāile khā’na, nahe upavāsa
Mādhavendra Purī avoided begging. He was completely unattached and indifferent to material things. If, without his begging, someone offered him some food, he would eat; otherwise he would fast.
This is the paramahaṁsa stage, the highest stage for a sannyāsī. A sannyāsī can beg from door to door just to collect food, but a paramahaṁsa who has taken ayācita-vṛtti, or ājagara-vṛtti, does not ask anyone for food. If someone offers him food voluntarily, he eats. Ayācita-vṛtti means being accustomed to refrain from begging, and ājagara-vṛtti indicates one who is compared to a python, the big snake that makes no effort to acquire food but rather allows food to come automatically within its mouth. In other words, a paramahaṁsa simply engages exclusively in the service of the Lord without caring even for eating or sleeping. It was stated about the six Gosvāmīs: nidrāhāra-vihārakādi-vijitau. In the paramahaṁsa stage one conquers the desire for sleep, food and sense gratification. One remains a humble, meek mendicant engaged in the service of the Lord day and night. Mādhavendra Purī had attained this paramahaṁsa stage.