Al-ʿAbbās b. ʿAlī known as Abū l-Faḍl (the Father of Excellence) and Qamar Banī l-Hāshim (the Moon of Banu Hashim), is the son of Imam Ali (AS) and Umm al-Banin. In Karbala, he was the standard-bearer and water-supplier of the army of his brother, al-Husayn(AS) and thus he is also known among Shi'a as Saqqa [the water-supplier] of the plain of Karbala.
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الإمامُ زينُ العابدينَ عليه السلام : الدُّعاءُ يَدفَعُ البَلاءَ النّازِلَ وَما لَم يَنزِلْ .
Imam Zayn al-Abidin (AS) said, 'Supplication repels descended calamities and those which are yet to descend.'
al-Kafi, v. ۲, p. ۴۶۹, no. ۵
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