It is narrated from Hazrat Abu Umamah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: In the last era of this Ummah, there will come some people who will have whips in their hands like the tails of cows. Their mornings will be spent in the displeasure of Allah and their evenings in His wrath.
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22150
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد حسن