The idea of an “angel of death” is present in several religions. The “angel of death” is known as Samael, Sariel, or Azrael in Judaism; as Malak Almawt in Islam; as Yama or Yamaraj in Hinduism; and as the Grim Reaper in popular fiction. In various mythologies, the angel of death is imagined as anything from a cloaked skeletal figure with a sickle, to a beautiful woman, to a small child. While the details vary, the core belief is that a being comes to a person at the moment of death, either actually causing death or simply observing it—with the purpose of then taking the person’s soul to the abode of the dead.
This “angel of death” concept is not taught in the Bible. The Bible nowhere teaches that there is a particular angel who is in charge of death or who is present whenever a person dies. Second Kings 19:35 describes an angel putting to death 185,000 Assyrians who had invaded Israel. Some also see Exodus chapter 12, the death of the firstborn of Egypt, as the work of an angel. While this is possible, the Bible nowhere attributes the death of the firstborn to an angel. Whatever the case, while the Bible describes angels causing death at the command of the Lord, Scripture nowhere teaches that there is a specific angel of death.
God, and God alone, is sovereign over the timing of our deaths. No angel or demon can in any sense cause our death before the time God has willed it to occur. According to Romans 6:23 and Revelation 20:11-15, death is separation, separation of our soul-spirit from our body (physical death) and, in the case of unbelievers, everlasting separation from God (eternal death). Death is something that occurs. Death is not an angel, a demon, a person, or any other being. Angels can cause death, and may be involved in what happens to us after death—but there is no such thing as the “angel of death.”