bad-hearted

See: diabolic
References in classic literature ?
Thus these bad-hearted nephews of King Aegeus, who were the own cousins of Theseus, at once became his enemies.
in truth, it is just so with me; you are, nevertheless, it must be confessed, a very bad-hearted young man.
So I went like a sick, silly, and bad-hearted schoolboy, feeding my anger against a fellow-man, when I would have been better on my knees, crying on God for mercy.