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Between both of his shoulders was the Seal of Prophethood that was equal to the size of a pigeon egg. He (peace and blessings be upon him) was of a medium height. It was his miracle that when he (peace and blessings be upon him) would separate from people, he would appear medium-tall in height and when he would sit or walk with others, he would look the tallest of all.
The Sublime Biography of the Final Messenger of Allah · 133 · Maktaba-tul-Madinah
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