Haggai. Referrence verse is Haggai - 1:13
the angel of God who sent down all the messages to the prophets
God treated them equally , they are called major and minor prophets according to their books.
Prophets
The prophets in the old testament were all called by god to be prophets. None of them wanted to be one by themselves, they were all god called people to do gods work. And mostly all were from humble back grounds.
The twelve minor prophets spoke of many things, but their main message was the need for repentance, especially among the Ten Tribes.
Prophets are called by God, to tell man what God wants man to know, philosophers are using their knowledge and reasoning only.
With the exception of Jeremiah, John the Baptist, and Jesus who were all called to be prophets before they were formed in the womb, those called to be God's prophets were ordinary citizens of Israel. Some were shepherds and fishermen.
Yes there are false prophets, people who claim to be prophets, when they are really not sent or called by God.
According to Islam all prophets named in Quran and testament are Muslims _________________________________________________ All God prophets are Muslim prophets before they called for Islam (that means in Arabic surrender to Allah; God in English and same God worshiped by Jews and Christians). They are more than 12500 God prophets; some of them (25 prophets) are mentioned by name in Quran. refer to question below.
Muhammad (peace be upon him) per Quran revelation to him by God through the angel Gabriel. However, all God prophets called for Islam; including Noah, Abraham, Moses, Jesus, and Muhammad. Refer to question below.
The prophets came to the world at a period mankind was very much deep in sin. Their work was to warn mankind and give them the message of salvation.
Any angel that God determines to use to show mercy. It can even come thru human intervention thru the hands of God.