Sorure Ahle Iman fi Alamat Zohour Sahab Al Zaman or Happiness of believers on the signs of Imam Mahdi' appearing was written on the subject of signs of Imam Mahdi the twelfth imam of Shiite by Ali ibn Abdul Karim Nili. The author narrated nearly one hundred and one narrations of ancestor's books. Some of these narrations are on the way of governing and periods of Imam Mahdi ruling.