Noun
The quality or state of being hasty; haste; precipitation; rashness; quickness of temper.
Source: Webster's dictionaryHastiness and superficiality are the psychic diseases of the 20th century, and more than anywhere else this disease is reflected in the press. Aleksandr Solzhenitsyn
Hastiness is the beginning of wrath, and its end repentance. Dutch Proverb
he soon regretted his haste Source: Internet