Imamate of Imam Hasan Askari عليه السلام
Kitāb al-Ghayba|Volume 1|Book 1|Chapter 33
193- وقد روي أنه لما ولد لأبي الحسن عليه السلام جعفر هنئوه به فلم يروا به سرورا، فقيل له في ذلك فقال: هون عليك أمره سيضل خلقا كثيرا.
H 193 - It is narrated that when Ja’far was born to Abul Hasan عليه السلام, people congratulated him, but they did not see any signs of joy in him. He was asked about it. The Imam replied, “Take his birth easy; he will misguide many.”