It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Oppression will appear as darkness on the Day of Resurrection."
Hadith Referenceالادب المفرد / كتاب الظلم / 485
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، كتاب المظالم ، باب الظلم و ظلمات يوم القيامة : 2447 و مسلم : 2579 و الترمذي : 2030 - انظر الصحيحة : 858»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: See the benefits of Hadith: 483.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 485