Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) turned towards us and said: "O Muhajirun! There are five (trials) with which you will be tested, and I seek refuge with Allah lest you live to see them: (1) When indecency becomes widespread among a people and they commit it openly, then plague and diseases that were not known among their predecessors will spread among them. (2) When people cheat in weights and measures, they will be afflicted with famine, severe hardship, and the oppression of their rulers. (3) When people withhold the payment of zakat, rain will be withheld from the sky, and were it not for the animals, no rain would fall upon them. (4) When they break their covenant with Allah and His Messenger (peace and blessings be upon him), Allah will enable their enemies, who are not from among them, to overpower them and take some of what is in their hands. (5) When the rulers of the Muslims do not judge according to the Book of Allah and do not give preference to what Allah has revealed, Allah will cause them to fight among themselves."