Anas bin Malik (may Allah be pleased with him) narrates that Abu Talhah (may Allah be pleased with him) did not use to fast during the time of the Messenger of Allah (peace and blessings be upon him). When the Prophet (peace and blessings be upon him) passed away, he was never found without fasting except on the Day of Fitr and the Day of Nahr (Sacrifice).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8486