After the birth of Imam Mahdi (may God hasten his Apparition) Imam Hassan wrote a letter to Ahmad Ibn Is’haqe Qomi and said to him: "God Almighty gave me a son and you should keep this joyful news to yourself. We did not unveil this news to anyone, but only to those who are very close to us; and those who have already accepted our Velayat in their hearts. I wanted to tell you this news to make you happy; I know you will rejoice from this blessed event, just like us!"
The splendid Sun!
In the city of Qom, there lived a famous astrologist. When Ahmad Ibn Is’haq read the news of Imam Mahdi’s birth (may God hasten his revelation), he summoned this famous astrologist to his house and told him that God had given him a son. He then informed him of the time of the baby’s birth. The astrologist calculated the horoscope of the newborn baby. After studying the horoscope, he declared to Ibn Is’haq:
"My friend! I can truly say that this baby is not yours. He should be the child of a Prophet or a Successor of a Prophet! Because his horoscope showed me that, everything will be under his command! In fact, the entire world, from east to west, and all the deserts and mountains and oceans and mainland will obey him and only him! No one shall remain on earth, but only those who believe in him and accept him as his or her true legitimate Imam!"