Sayyidah Aishah (may Allah be pleased with her) narrates: I never saw the Messenger of Allah (peace and blessings be upon him) fasting during the ten days.
(Imam Muslim (may Allah have mercy on him) recorded it in the Sahih from Ishaq bin Ibrahim. The report that affirms takes precedence over the one that negates, together with the hadith of Ibn Abbas (may Allah be pleased with them both) that has already passed.)
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8394