(225) بَابُ الظُّلْمُ ظُلُمَاتٌ
Jabir reported that the Prophet, may Allah bless him and granthim peace, said, "Beware of injustice. Injustice will appear as darknesson the Day of Rising. Fear avarice. It destroyed those before you and causedthem to shed one another's blood and to make lawful what was unlawful."
Reference: Al-Adab Al-Mufrad 488
In-book reference: Book 28, Hadith 6
English translation: Book 28, Hadith 488