Phor-poo-lersri (พ่อปู่ฤษี) is same as the great teacher of monk and master in thailand , he is not only the observer religious precepts, but also has much knowledge, sciences and so on.
The venerable lersri tradition is therefore linked to the Buddhist tradition, and its practioners were hermits of sundry ascetic practices that nowadays are totally forgotten, as well as in touch with diverse practices from the Hindu and Animist traditions, one of their main principles being that extreme purification of one's body leads to purification of one's spirit in the attainment of Awakening.
From the origin the lersri enjoyed a lot of freedom in their life and Spiritual practice, having no fixed organization to watch over them and give them order, so they were living free lives, being living example of the joy there is to be a Holy man and help other being by miraculous ways.
The ancient teachers pay respects of Phor-poo-lersri as the highest teachers who have many benefits that teach to the students willingly. The highest teachers have built Phra lersri's picture of worshipping. And the latter period of time also go to worship "phra ersi" in order to make a merit.
The one who prepossessing "Phorpoo lersri " must honest in his occupation, strongly pay attention to Phor Poo will receive a good thing. Phorpoo lersri will bring that one prosperous, charming and selling, and also protect him out of the devils, dangerous as the glass for making everything as he wants and succeeds.
The merit of worshipping Phorpoo lersri is for the one who worship will receive the protection, has a charming and great kindness, succeed in duty and responsibility and has a luck and money, be richer and richer.