an.1.170 Aṅguttara Nikāya (Numbered Discourses)
The Chapter on One Person
170“One person, mendicants, arises in the world for the welfare and happiness of the people, out of compassion for the world, for the benefit, welfare, and happiness of gods and humans.
What one person?
The Realized One, the perfected one, the fully awakened Buddha.
This is the one person, mendicants, who arises in the world for the welfare and happiness of the people, out of compassion for the world, for the benefit, welfare, and happiness of gods and humans.”