Hadith 8:2948
Abu Bakr narrated to us, he said: Ibn Mahdi narrated to us, from Salih ibn Abi al-Akhdar, from a man who is called Khalid, from a freedwoman of theirs, from her grandmother, that al-Hasan and al-Husayn arrived in Mecca at night, so they performed Tawaf, then they departed.
حدثنا أبو بكر قال نا بن مهدي عن صالح بن أبي الأخضر عن رجل يقال له خالد عن مولاة لهم عن جدتها أن الحسن والحسين قدما مكة ليلا فطافا ثم خرجا