an.6.113 Aṅguttara Nikāya (Numbered Discourses)
Discontent
“Mendicants, there are these three things.What three?
Discontent, cruelty, and unprincipled conduct.
These are the three things.
To give up these three things you should develop three things.
What three?
You should develop rejoicing to give up discontent, harmlessness to give up cruelty, and principled conduct to give up unprincipled conduct.
These are the three things you should develop to give up those three things.”