One of the nicknames of Aba al-Fadl al-Abbas (peace be upon him) is "Tayyar" [flyer], because like his uncle, Ja'far Ibn Abi Taleb al-Tayyar (peace be upon them), two wing were granted to him instead of his two cut hands to fly in the paradise with the angels.
In the battle of Mu'tah, the Holy Prophet (Allah's prayers be upon him and upon his holy Household) has appointed Zayd Ibn Harith to be the leader of the Muslim Army, then said: If Zayd is martyred, the leader would be Ja'far Ibn Abi Taleb. And if Ja'far is martyred...
Zayd bin Harith got ready for the start of the battle. He strongly shook the banner of the Muslim Army and rushed towards the core of the enemy. His rushing made the Muslim forces start the battle with enthusiasm. Strong fights took place. Spears tore Zayd's body. So, he fell on to the ground dyeing it red. Before the banner dropped from Zayd's hand, Ja'far bin Abu Taleb had rushed and caught it strongly. He began fighting severely. His voice became loud in the middle of the noise of the fights. He announced the good news about victory or martyrdom which each believer hoped. Ja'far bin Abu Taleb jumped off his horse to show his insistence on fighting. He was the first to do that in the history of Islam. He was like the mountain. He was facing the enemies’ hits. His firmness astonished them. So, the enemies intensified their attacks against him. A sword hit his right hand. So, it flew in the wind. Ja'far took the banner of Islam with his left hand and began fighting. Another sword hit his hand and cut it off. Ja'far pressed the banner to his bosom with his upper arm so that the fight would go on. During those terrible moments, Ja'far was hit again. He fell over the ground and became a martyr.
Gabriel (peace be upon him) descended from the sky to tell our Master Mohammad (Allah’s prayers be upon him and upon his holy Household) about the news of the battle.
Our Master Mohammad (Allah’s prayers be upon him and upon his holy Household) began condoling Asmaa, the great Martyr's wife. The Holy Prophet (Allah’s prayers be upon him and upon his holy Household) came into Ja'far's house. He found his children sitting. The Prophet (Allah’s prayers be upon him and upon his holy Household) kissed Ja'far's children and held them on his lap. He shed tears. Asmaa felt that something had happened to her husband. So, she asked the Prophet (Allah’s prayers be upon him and upon his holy Household): Allah's Apostle, have you heard anything about Ja'far and his companions?
Yes, they've been martyred!
The Prophet (Allah’s prayers be upon him and upon his holy Household) left the house. He asked his daughter Lady Fatima az-Zahra (peace be upon her) to fix some food for them, for a disaster had befallen them.
When the soldiers of Islam came back to their homeland, they began telling their families about Ja'far's heroic actions and those who were martyred. One of them said: We've seen 90 wounds in Ja'far's body. Another said: I've seen him when his right hand had been cut off. The third said: I've seen him when his left hand had been cut off. He had fallen over the ground and his wounds bled.
Our Master Mohammad (Allah’s prayers be upon him and upon his holy Household) said: Gabriel (peace be upon him) has told me that Allah has granted Ja'far two wings to fly with in the Paradise. That night, Ja'far's children lay on their beds. They were looking at the sky full of stars. In the meantime, they imagined that their father was flying with his wings like angels.
On the other hand, the nephew Aba al-Fadl al-Abbas (peace be upon him) has a higher position. He (peace be upon him) was also cut both hands in the epic of at-Taf in Karbala, and he was hit by an arrow to his eye, an iron stick on his forehead, and thrown with arrows until his skin became like a hedgehog, then he was cut into pieces. Imam Ali Zayn al-'Abideen (peace be upon him) cried whenever he remembered his uncle al-Abbas (peace be upon him).
Once Imam Ali Zayn al-‘Abideen (peace be upon him) saw 'Ubaydullah son of al-Abbas son of Imam Ali (peace be upon them all), he cried and said: “No day was more difficult for Allah’s Messenger than the Day (Battle) of Uhud in which his uncle Hamza Ibn ‘Abd al-Muttalib, the lion of Allah and the lion of His Messenger, was killed, and after it was the Day (Battle) of Mu’ta in which his cousin Ja‘far Ibn Abi Taleb was killed.” Then he (Zayn al-‘Abideen) said: “And there was no day like the Day of al-Hussayn, when thirty thousand men advanced against him (while) they claimed that they belonged to this community [Ummah], and that they (wanted) to seek proximity to Allah, the Great and Almighty, through (shedding) his blood. He (al-Hussayn) reminded them of Allah, but they did not learn (from him) till they killed him out of (their) hatred, oppression and aggression.”
And then said: “May Allah have mercy upon my uncle, al-’Abbas. He preferred his brother to himself; he did well, and sacrificed himself for his brother until he lost his two hands for the sake of this. Thus, instead of his two hands, Allah will give him two wings with which he will fly with the angels in Paradise, just like Ja’far ibn Abi-Taleb. In the sight of Allah the Blessed, the Exalted, al-’Abbas enjoys a peculiar rank for which all the shahids [martyrs] will be hopeful for if they had its like on the day of Resurrection
The previous statement of Imam Zayn al-'Abideen (peace be upon him) includes the most significant sacrifices that al-’Abbas did towards his brother - Imam al-Hussayn (peace be upon him). For the sake of his brother, al-’Abbas sacrificed his two hands and went on resisting until he was felled. For these great sacrifices, God will grant al-’Abbas an unparalleled rank that all martyrs will wish for if they had its like, including the great martyrs Hamza Ibn Abd al-Muttalib and Ja'far Ibn Abi Taleb, who wish they had his position and rank bestowed to him by the Almighty on the day of resurrection, for the uncountable sacrifices, chivalry and altruism in Karbala.
So, peace be upon him the day he was born, the day he was martyred and the day he will be sent alive.