Sayyiduna Ali (may Allah be pleased with him) was passing by the city of Babylon (Babil) when the mu'adhdhin came and informed him of the Asr prayer. When he had passed beyond it, he ordered the mu'adhdhin, who called the iqamah. When he had finished the prayer, he said: "My beloved (peace and blessings be upon him) forbade me to pray in a graveyard and in the land of Babylon, for that land has been cursed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4364