The phrase 'the Wings of Azrael' refers to the approach of death; the signs of death coming on the dying. The story goes that Moses petitioned Allah to send a being to relieve people of their lives, having had a virgin who had lived for over 500 years resurrected, and hearing her complaining of the world weariness she had experienced. Allah then sent Azrael to take people's lives after sixty or seventy years.
The Muslim theology, Azrael is the angel of death. He will be the last to die, but will do so at the second trump of the archangel.