The historians mentioned that on the seventh day of Moharram 61 AH, the siege on Imam al-Hussayn (peace be upon him) and those with him intensified, and the way to water was blocked from them and their water ran out. Omar bin Sa’d (may God curse him) assigned five hundred men to guard the al-‘Alqami River, after a letter came to him from the cursed Ibn Ziyad instructing him to prevent water from al-Hussayn (peace be upon him), his family and companions (may God Almighty be pleased with them).
So each one of them was thirsty, and of course the children were between groaning, whimpering and sobbing, and requiring water. And Aba Abdillah al-Hussayn (peace be upon him), as well as the men of his family and companions were suffering and witnessing the suffer of the children
The narrations stating that on the seventh of Moharram, Aba al-Fadl al-Abbas (peace be upon him) was anguished to see the children and women of Ahl Al-Bayt distressed because of thirst. He decided then to go and bring water by force, accompanied by thirty horsemen and twenty of infantry, taking with then twenty bladders and all, attacked the siege made by the enemy army on the Euphrates River, Nafi' Bin Hilal al-Muradi, one of the most faithful companions of Imam al-Hussayn faced 'Amru Bin Al-Hajjaj al-Zubaydi, one of the criminals of Karbala battle, and who has been entrusted to guard the Euphrates, so he said to Nafi':
What brought you here?
He said: We came to drink the water that you prohibited us.
He replied: You can drink!
Nafi' then replied: I drink and al-Hussayn and the rest of his companions are thirsty?
The criminal said: No way that they drink. We are here to prohibit them from the water!
But this, did not stop the heroes from the companions of Imam al-Hussayn (peace be upon him), and mocked of his words, they broke into the Euphrates to fill their water skins. 'Amru Bin Al-Hajjaj railed in their faces with a detachment of his soldiers, but the hero of Karbala; Aba al-Fadl (peace be upon them) and Nafi' Bin Hilal faced them and there was a battle between them, but no one was killed on both sides, and the companions of Imam lead by Aba al-Fadl (peace be upon him) returned to the camps with their full water skins.
So, Aba al-Fadl (peace be upon him) gave water to the members of Ahl al-Bayt (peace be upon them) and quenched their thirst, and since he was given the title of "Saqqa' ", which is one of his most famous titles.