For the wicked are full of regrets.

[μεταμελείας γὰρ οἱ φαῦλοι γέμουσιν.]

Aristotle (384-322 BC) Greek philosopher

Nicomachean Ethics [Ἠθικὰ Νικομάχεια], Book 9, ch. 4 (9.4.10) / 1166b.24-25 (c. 325 BC) [tr. Welldon (1892)]
    (Source)

(Source (Greek)). Alternate translations:

For the wicked are full of remorse.
[tr. Chase (1847)]

Whence it is that the wicked are ever full of repentance.
[tr. Williams (1869)]

For those who are not good are full of remorse.
[tr. Peters (1893)]

For bad men are laden with repentance.
[tr. Ross (1908)]

The bad are always changing their minds.
[tr. Rackham (1934)]

For base people are full of regret.
[tr. Reeve (1948)]

For bad men are full of regrets.
[tr. Apostle (1975)]

For bad men are full of regrets.
[tr. Thomson/Tredennick (1976)]

For base people are full of regret.
[tr. Irwin/Fine (1995)]

For bad people are full of regrets.
[tr. Crisp (2000)]

For base people teem with regret.
[tr. Bartlett/Collins (2011)]