The Buddha shares the consequences for a person acting with a corrupted mind based on his direct knowledge.

Paduṭṭhacitta sutta - Corrupted Mind

This was said by the Blessed One, said by the Arahant, as I have heard:

"Here, bhikkhus, I discern with the mind, after having examined a certain person with a corrupted mind as follows: 'If this person were to die at this very moment, they would be reborn in hell, just as if they were carried and placed there.' What is the reason for this? Because their mind is corrupted. Due to the corruption of the mind, bhikkhus, some beings, after the breakup of the body, after death, are reborn in a state of loss, in a bad destination, in the lower realms, in hell."

The Blessed One spoke on this matter. In this regard, it is said:

"Having known a certain person here, to have a corrupted mind; The Buddha explained this matter, in the presence of the bhikkhus
If this person were to die, at this very moment; They would be reborn in hell, for their mind is corrupted.
Just as one might carry something and set it down, so too is such a person [placed in hell]; Indeed, due to the corruption of mind, beings go to a bad destination."

This matter too was spoken by the Blessed One, as I have heard.