It is narrated from the Mother of the Believers, Sayyidah Aishah (may Allah be pleased with her), that: "The Prophet (peace and blessings be upon him) would reach the morning in a state of janabah (major ritual impurity) because of (intimacy with) his wives, and then he (peace and blessings be upon him) would fast that day."
Only Abu al-Zubayr narrated this hadith from Abdullah bin Abi Salamah, and only Khalid bin Yazid from Abu al-Zubayr, while Bakr bin Mudar is alone in narrating it.