Saif Tammar narrates that Imam Ja’far As-Sadiq (as) said, “If I was with Prophet Musa and Al-Khidr (as), they would have accepted that I was better informed than they were. I would have brought to their knowledge certain things they were unaware of. They had knowledge of only the things past, and we know everything of past, present and future! This knowledge has come down to us from our Prophet as an inheritance.” Then the Imam said, “The Beneficent and Merciful Allah bestows kindness on His creations much more than their own parents. Allah has kept us informed of the events taking place on the earth and the sky.”
The Imam (as) also said, “Jibrail came to the Prophet (S) and gave him two pomegranates. The Prophet (S) ate one of them and made two portions of the other. One half of this he ate and gave the other half to Amir’ul-Mu’mineen ‘Ali (as) to eat. Then he said, ‘O ‘Ali! Do you know anything about these pomegranates? One of the fruits, from which you did not get any portion to eat, contained Prophet-hood. But the other pomegranate, that we shared, contained knowledge.’ The narrator asked the Imam (as),’ How was ‘Ali (as) a partner in the knowledge of the Prophet?” The Imam (as) replied, “Allah has not endowed any knowledge to the Prophet that He didn’t transmit to Amir’ul-Mu’mineen ‘Ali! In turn, that knowledge has come to us, the Imams!”
Then the Imam (as) added, “When Prophet Musa and Al-Khidr wanted to go their different ways from the bank of the river, they noticed a bird. The bird put a drop of water towards the east, another towards the west; one skywards and another drop of water on the earth. Then finally, the bird put one drop of water in the river. Both were wondering at this riddle.
At this moment one hunter emerged from the river and explained to Prophet Musa (as) and Al-Khidr (as) that the bird wanted to express that in the final Epoch there will be a Prophet (S) who will possess the knowledge of the east, the west, the earth and the sky. The bird put the fifth drop in the river to demonstrate that the knowledge of the Prophet (S) will be free flowing like the waters of the river. This knowledge will be in the possession of the Vicegerent and cousin of the Prophet (S). Telling this, the hunter vanished.”
Imam Ja’far As-Sadiq (as) said, “I possess the knowledge of the Book of Allah from cover to cover. The Qur’an, that contains information about the earth and the sky, of the past and the future, is firmly in our hands. We have the knowledge of everything!”