He will have an occultation and none shall be safe from...
He will have an occultation and none shall be safe from destruction but one whom Allah has kept steadfast in the belief of his Imam and given the divine opportunity (Tawfeeq) to pray for his reappearance.” Ahmad immediately asked, “Is there any sign or symbol so that it may satisfy my heart ?” Just then the boy, who looked like a full moon, began to speak and he said: “I am the remnant of Allah on His earth and the revenge- taker from His enemies and do not demand proof after what is before you…” After hearing these words of the Proof of Allah, Ahmad went out of the house of Imam Hasan Askari (a.s) in such a condition that his complete being was surrounded by joy.
When again he came to Imam Hasan Askari (a.s) after that he said: “O son of Allah's Messenger! I was very much pleased with the favor you bestowed me that day. Thus what is the continuing practice of Khizr and Dhulqarnain ?” His Eminence, Imam Hasan Askari (a.s) said in reply, “Prolonged occultation.” Ahmad at once said, “O son of Allah's Messenger, would the occultation of the Promised Imam (a.s) be also prolonged ?” His Eminence, Imam (a.s) replied, “By my Lord!