Hatred towards Imam Ali (as)

Kitab Al Sunnah by Al Khalal Vol 1, pg. 505:

"Narrated to me from Muhammad Bin Ali, from Al Ashram who said I heard Aba Abdillah (Ahmad Ibn Hanbal) when a hadith was mentioned to him from Aqeel (Ibn Khalid Ibn Aqeel Al Ayli Al Umawi) from Al Zuhri, **from Urwa, from Aisha from the prophet regarding Ali and Abbas,** and Aqeel from Zuhri that Abu Bakr ordered Khalid regarding Ali. He (Ibn Hanbal said 'How?' for he had not heard them. Then he said "I dislike that these narrations be recorded."

The narration is sahih as everyone in the chain narrated up to Ahmed as well as the chain of the hadiths Ahmed detested are reliable.

According to Abu¯ Jafar al-Iskafi and Ibn Abil Hadid, Urwa Ibn Al Zubayr belonged to a group of transmitters who fabricated reports to defame Ali. We read in Sharh Nahj Al Balagha Vol 4, pg. 63 - 64:

Urwa narrated that Aisha had told him, “I was with the Messenger of God when he saw Abbas and Ali. He said, ‘O Aisha, indeed these two shall not die as members of my community (millati).’ He may have said, ‘my religion (dini).’” 

Urwa also quoted Aisha as having said, “I was with the Prophet when he saw Abbas and Ali. He said, ‘If you would like to take pleasure in looking at two men from the people of Hell, then look at these two who have just appeared.’"