It is narrated from Hazrat Hudhaifa (may Allah be pleased with him) that he submitted to the Holy Prophet (peace and blessings be upon him): O Messenger of Allah! We were in evil, Allah removed it through you, and through your hands, He made goodness prevail. Will there be evil after this goodness as well? The Holy Prophet (peace and blessings be upon him) said: Yes! He asked: What will it be like? The Holy Prophet (peace and blessings be upon him) said: There will appear tribulations like the portions of a dark night, which will come one after another, and confusion will prevail over you just as the faces of cows resemble each other, and you will not be able to distinguish one from another.