It is narrated from Sayyiduna Abu al-Tufayl (may Allah be pleased with him) that Sayyiduna Ali (may Allah be pleased with him) disputed with Sayyiduna Abbas (may Allah be pleased with him) about the siqayah (the duty of giving water to the pilgrims). Then Sayyiduna Talhah bin Ubaydullah, Sayyiduna Amir bin Makhramah bin Nawfal and Sayyiduna Azhar bin Abd Awf (may Allah be pleased with them) testified: "The Prophet (peace and blessings be upon him) entrusted this duty to Sayyiduna Abbas (may Allah be pleased with him) on the day of the Conquest of Makkah."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Imam al-Zuhri (may Allah have mercy on him) except Ya'qub bin Zayd, and no one narrated it from Ya'qub except Muhammad bin Ja'far; al-Waqidi is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 8285
Hadith Gradingمحدثین:إسناده ضعيف، فيه الواقدي
Hadith Takhrij«قال الهيثمي: فيه الواقدي وفيه كلام كثير وقد وثق «مجمع الزوائد ومنبع الفوائد، ج 3، ص 286»»