الكافي 1/4/122/6

6. Al-Husayn ibn Muhammad from Mu‘alla ibn Muhammad from Muhammad ibn Ali from Muhammad ibn Hamza al-Hashimi from Ali ibn Muhammad or Muhammad ibn Ali al-Hashimi who has said the following “ I went tot see abu Ja‘far عليه السلام in the morning of his marriage to the daughter of al-Ma’al-Ma’mun. The night before I had taken medicine and I was the first to meet him that morning. I was thirsty but did not like to ask for water. Abu Ja‘far عليه السلام looked at me and said, “I think you are thirsty.” I said, “Yes, I am thirsty.” He called, “O Ghulam (male slave or servant) or Jariya (female slave orservant) bring us water.” I said to myself, “They may poison the water. For this reason I became depressed. The servant then came with water. He (abu Ja‘far عليه السلام looked at me with a smile and, “O Ghulam, give the water.” He drank from it and gave the rest to me and I drank. I became thirsty again and did not like to ask for water. He then did as he had done before. When the Ghulam (servant) came with the bowl of water I thought as I thought before. He then took the bowl, drank from it and gave the rest to me with a smile.” Muhammad ibn Hamza has said that this Hashimi told me, “I think what they (Shi‘a ) say (that Imams possess Divine Authority) about him is true.”