Was the Seal of Prophethood between the shoulders of the Prophet, may God’s prayers and peace be upon him, one of the signs of his prophethood that the monks knew before his mission, as Salman al-Farsi mentioned it among the signs of the awaited Prophet?

The Seal of Prophethood is one of the signs of prophethood. Its description and location have been reported in authentic hadiths. It was between the shoulders of the Prophet, peace and blessings be upon him, near the cartilage of his left shoulder, like an apple or a pigeon's egg, and it had black moles like warts.