This was said by the Buddha, the Perfected One: that is what I heard.
“Mendicants, suppose a mendicant has a sensual, malicious, or cruel thought while walking. They tolerate it and don’t give it up, dispel it, eliminate it, and obliterate it. Such a mendicant is said to be ‘not keen or prudent, always lazy, and lacking energy’ when walking.
Suppose a mendicant has a sensual, malicious, or cruel thought while standing … sitting … or when lying down while awake. They tolerate it and don’t give it up, dispel it, eliminate it, and obliterate it. Such a mendicant is said to be ‘not keen or prudent, always lazy, and lacking energy’ when lying down while awake.
Suppose a mendicant has a sensual, malicious, or cruel thought while walking. They don’t tolerate them, but give them up, dispel them, eliminate them, and obliterate them. Such a mendicant is said to be ‘keen and prudent, always energetic and resolute’ when walking.
Suppose a mendicant has a sensual, malicious, or cruel thought while standing … sitting … or when lying down while awake. They don’t tolerate it, but give it up, dispel it, eliminate it, and obliterate it. Such a mendicant is said to be ‘keen and prudent, always energetic and resolute’ when lying down while awake.”
The Buddha spoke this matter. On this it is said:
“Whether walking or standing, sitting or lying down, one who thinks a bad thought to do with the domestic life
is practicing the wrong way, lost among things that delude; such a mendicant is incapable of experiencing the highest awakening.
But one who, whether standing or walking, sitting or lying down, has calmed their thoughts, loving peace of mind; such a mendicant is capable of experiencing the highest awakening.”
This too is a matter that was spoken by the Blessed One: that is what I heard.