Abd al-Rahman bin Abdullah bin Dinar narrates from his father that he heard Sayyiduna Ibn Umar (may Allah be pleased with them both) cite this verse of Abu Talib as an illustration:
'Wa abyada yustasqal-ghamamu bi-wajhihi, thimalul-yatama 'ismatun lil-aramil'
Translation: "The fair-faced one through whom even the clouds receive bounty, the helper of orphans and the feeder of widows."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة الاستسقاء / 6425