الكافي 1/4/80/21

21. Ahmad ibn Idris has narrated from Muhammad ibn Ahmad from Ja’far ibn al-Qasim from Muhammad ibn al-Walid al-Khazzaz from al-Walid ibn ‘Uqba from al-Harith ibn Ziyad from Shu‘ayb from abu Hamza who has said the following. “ Once I went to see abu ‘Abdallah عليه السلام and said to him, “Are you the in charge of this task ((to rise with divine power)?” he said, “No, I am not he.” I then asked, “Is he your son?” He said, “No, my son will be he either.” I then asked, “Will the son of your son be he?” He said, “No, my grandson will not be he.” I then asked will your great grandson be he?” The Imam عليه السلام said, “No, my great grandson will not be he also.” I the asked, “Who then be he?” The Imam عليه السلام said, “He will be the one who will fill the earth with justice after its being filled with injustice and cruelty. (He will come) at a time when the Imams will be absent just as the Messenger of Allah was raised (to preach) when for a long time there had come no messengers.”