Canonical Reference: Dhp 160 Verified Source

“One truly is the protector of oneself; who else could the protector be? With oneself fully controlled, one gains a mastery that is hard to gain.”

Canonical Pali Original: Attā hi attano nātho, ko hi nātho paro siyā; Attanā hi sudantena, nāthaṃ labhati dullabhaṃ.

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

Pali Canon: Dhammapada 12.160 on supreme self-reliance, self-discipline, and rejecting dependence on superstitious saviors.