Hazrat Abdullah bin Umar (may Allah be pleased with them both) narrated that the Prophet Muhammad (peace and blessings be upon him) said: "Oppression will be darkness on the Day of Resurrection."

Hazrat Abdullah bin Umar (may Allah be pleased with them) narrated that the Messenger of Allah (peace and blessings be upon him) said: A Muslim is a brother to another Muslim, so he should not oppress him nor let him be oppressed. Whoever fulfills the need of his brother, Allah will fulfill his need. Whoever removes a calamity from a Muslim, Allah will remove one of the great calamities of the Day of Resurrection from him. And whoever conceals the faults of a Muslim, Allah will conceal his faults on the Day of Resurrection.

Hazrat Abu Musa (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings of Allah be upon him) said: Allah Almighty gives respite to the oppressor for some days in this world, but when He seizes him, He does not let him go. The narrator stated that then the Prophet recited this verse: "And thus is the seizure of your Lord when He seizes the towns while they are committing wrong. Surely, His seizure is painful and severe."