Mukhtasar Muslim (Abridged) 1560 — About the Seal of Prophethood

Sayyiduna Sa’ib bin Yazid (may Allah be pleased with him) says that my maternal aunt took me to the Messenger of Allah (peace and blessings be upon him) and said, "O Messenger of Allah! My nephew is very ill." The Prophet (peace and blessings be upon him) placed his hand on my head and prayed for blessing. Then he performed ablution, and I drank the leftover water from his ablution. Then I stood behind the Prophet (peace and blessings be upon him) and I saw the Seal of Prophethood between his two shoulders, like a raised lump (or like the egg of a partridge, which is a kind of bird).