Sayyiduna Usamah bin Zayd (may Allah be pleased with him) narrates that Sayyiduna Ali (may Allah be pleased with him) said to me: "O Usamah! What is the matter with you that you do not go out with us, when you are indeed one of the members of the Household (Ahl al-Bayt)?" I said: "You have spoken the truth; there is no one more deserving than you that I should go out with him. But by Allah, I will not fight people who pray after this saying of the Messenger of Allah (peace and blessings be upon him): 'Why did you not leave him? Or did you split open his heart and look into it?'"
No one narrated this hadith from Abd al-Malik bin Umayr (may Allah have mercy on him) except Sa'id bin Zayd (may Allah have mercy on him), and no one from Sa'id (may Allah have mercy on him) except Ata' bin Muslim (may Allah have mercy on him), and Ubayd bin Jannad (may Allah have mercy on him) is alone in narrating it.