sn.1.24 Saṁyutta Nikāya (Linked Discourses)

“From whatever one reins in the mind,
From that no suffering comes to one.
Should one rein in the mind from everything,
One is freed from all suffering.”

“One need not rein in the mind from everything
When the mind has come under control.
From whatever it is that evil comes,
From this one should rein in the mind.”