If there was only this narration about Al-Abbas (peace be upon him) it would be sufficient pride, as Imam As-Sadeq (peace be upon him) said about him: 'Our uncle Abbas son of Ali had sharp foresight and firm faith. He fought alongside my father Al-Hussayn and gave ample evidence of his bravery and courage until he was martyred.'
Also there's the narration of Imam Zayn Al-'Abideen (peace be upon him) about him: "May Allah have mercy on my uncle Abbas. He fought valiantly and ransomed himself upon his brother until both his arms were severed. Then Allah granted him wings in place of his arms. He now soars with his wings along with the angels in Paradise just like Jafar Ibn Abi Talib (peace be upon him). Surely the Almighty Allah has placed Al-Abbas in such an elevated rank and position, that all the martyrs shall envy him on the Day of Judgment." The Commander of the Faithful (peace be upon him) has also many narrations about his bounty and position, such as: "Surely, my son Al-Abbas was well fed the knowledge like a bird is fed."
Inspired from this, Karbala condolences processions have commemorate the eve and day of the seventh of the sacred of the month of Muharram to recall the great position of Aba Al-Fadl Al-Abbas (peace be upon him), for his great role with his brother Aba Abdillah Al-Hussayn (peace be upon him), especially his courage and prowess in defending the family of the Messenger of Allah and Ahl Al-Bayt (Allah's prayers be upon them).
It is to mention that Aba Al-Fadel Al-Abbas (peace be upon him) was the most knowledgeable and courageous of the companions of Imam Al-Hussayn (peace be upon him), and he was a hero knight and the trace of prostration was between his eyes. He was a handsome man that is why he was called "The moon of Bani Hashem". He used to ride the strongest and most beautiful horses and his feet were tracing the ground. He was patient in challenges in the field of wars. And in At-Taf he was the standard bearer of Al-Hussayn (peace be upon him) as he was the commander of his army. Therefore Imam Al-Hussayn (peace be upon him) was preventing him to go fight saying: "O brother, if you go to fight, my army will disperse, and my group will end scattered."