Canonical Reference: Dhp 360361 Verified Source

“Good is restraint in the eye; good is restraint in the ear; good is restraint in the nose; good is restraint in the tongue. Restraint in everything is good. A seeker restrained in all things is freed from sorrow.”

Canonical Pali Original: Cakkhunā saṃvaro sādhu, sādhu sotena saṃvaro; Ghānena saṃvaro sādhu, sādhu jivhāya saṃvaro... Sabbattha saṃvuto bhikkhu, sabbadukkhā pamuccati.

— Gautam Buddha
The Awakened One, Founder of Dhamma
Historical Setting & Context:

Pali Canon: Dhammapada 25.360-361 on Indriya-samvara (restraint of the senses) for inner liberation.