Sayyiduna Hisham bin Amir (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "From the creation of Adam (peace be upon him) until the Hour is established, there is no trial (fitnah) greater than the Dajjal."
Hadith Referenceالمعجم الكبير للطبراني / باب الهاء / 18670