983/1302 (Hasan al-Isnad) from Zayd ibn Thabit: That Umar ibn al-Khattab came to him one day seeking permission to enter, so he permitted him while his head was in the hand of a slave girl of his who was combing his hair, so he withdrew his head. Umar said: Let her comb your hair. He said: O Commander of the Faithful! If you had sent for me, I would have come to you. Umar said: "The need is mine."