Everyone of Balkh city became a liar
Sayyiduna Khuwajah Abu ‘Ali Daqqaaq reported that when the people of Balkh exiled Sayyiduna Khuwajah Muhammad Bin Fadl despite being guiltless, he invoked the curse unto the people of the city and said, ‘O my Allah do not give them the ability to speak the truth.’ Consequently, there left no truthful person in the city for years and every person of the city became liar. The city notoriously became famous as ‘the city of liars’.
(Ruh-ul-Bayan, vol. 2, pp. 46; part 3, Surah Aal-e-‘Imran, Ayah 63)
Nevertheless, one should never displease the saints of Allah Otherwise, the slightest distress may call wrath of Allah that may result in utter destruction.