If one is tired of the sufferings of the world and seeks for longevity happiness, he should settle down in a peaceful and hygienic place and form a pure secure boundary, recite this Dharani for 108 times and dedicate it to his clothing, water, food, fragrances and/or medicine before using them, then he will certainly live a long life. If he can form a secure boundary, accept and hold the Dharani in accordance with the Dharma, then everything will be achievable.
若復有人，厭世間苦，求長生樂者，在閑靜處，清淨結界，咒衣著，若水、若食、若香、若藥皆咒一百八遍，服必得長命，若能如法結界，依法受持，一切成就。
The method of forming a secure boundary: 結界法：
Take some clean water and recite the Dharani for 21 times then dedicate the merits to the water. Thereafter sprinkle the water around as the boundary.
取淨水，咒二十一遍，散著四方為界；
The Ten Features of 《The Great Compassion Mantra》
大悲咒的十種相貌
The Reasons Why Avalokitesvara Bodhisattva Spoke about 《The Great Compassion Mantra》
觀音菩薩說大悲咒的因緣
The Practice of 《The Great Compassion Mantra》
大悲咒的修法
The Merits of Reciting & Upholding《The Great Compassion Mantra》
持誦大悲咒的功德利益
Wonders of Reciting 《The Great Compassion Mantra》
持誦大悲咒的神奇感應
Recite & Upold 《The Great Compassion Mantra》 to Make a Secure Boundary in accordance with the Dharma
持誦大悲咒如法結界
The Merits are Endless for those who chant the mantra
持誦大悲咒功德盡未來際
How to Eradicate Catastrophes and Cure Sickness with 《The Great Compassion Mantra》
大悲咒消災解厄、癒疾之法
* 以上出自《千手千眼觀世音菩薩廣大圓滿無礙大悲心陀羅尼經》