It is narrated from Sayyiduna Ali (may Allah be pleased with him) that he said: "When the last ten days (of Ramadan) began, the Prophet (peace and blessings be upon him) would strive hard (in worship) himself, and his (peace and blessings be upon him) family would also strive hard."
No one narrated this hadith from Abu Ishaq (may Allah have mercy on him), from al-Aswad (may Allah have mercy on him), except Anbasah (may Allah have mercy on him), and Ahmad bin Abi Taybah (may Allah have mercy on him) is alone in narrating it from him.