Which biblical prophet was called God’s angel?

The word translated “angel” in the Bible simply means “messenger”. In the Old Testament, the Hebrew word is malak. Sometimes the word is used of a human being. For example, in 1 Kings 19:2, Queen Jezebel sent a messenger (malak) to Elijah. But often it refers to one of God’s heavenly messengers — his angels.

Any of God’s prophets could be called “God’s messenger” since that is what a prophet was. In Hebrew, that would be the same as saying “God’s angel”. Two prophets who are specifically called that are Haggai (Haggai 1:13) and Malachi (who name means “my messenger”).