"The seal of the Messenger of Allah ﷺ" - meaning the one which was between his two shoulder blades - "was fleshy and red, resembling the egg of a pigeon."
كَانَ خَاتَمُ رَسُولِ اللَّهِ ﷺ يَعْنِي الَّذِي بَيْنَ كَتِفَيْهِ غُدَّةً حَمْرَاءَ مِثْلَ بَيْضَةِ الْحَمَامَةِ