H 489 - It is narrated from Fadhl from Musa bin Sadan from Abdullah bin Qasim Hadhrami from Abi Saeed Khurasani that he said: I asked Imam Ja’far Sadiq , “Is the Mahdi and the Qaim the same?” He said: “Yes.” I asked, “Why is he named the Mahdi?” He said: “Because he will be guided to every hidden matter; and he is named Qaim, because he will rise after his name dies. He will establish a mighty enterprise.”