Moses Established Criteria For Future Prophets

Moses as the first prophet to write a book set the standard for all future prophets. He also made a prediction for the special prophet - "I will raise them up a Prophet from among their brethren, like unto thee, and will put my words in his mouth; and he shall speak unto them all that I shall command him (Deuteronomy 18:18)." Some claimed that "among the brothers" means that the Prophet will not be an Israelite, but from his brother. Well, Esau is the brother of Israel and I have not seen any significant Edomite prophet. But I have seen a descendant of Israel's uncle, Ishmael, claiming to be a prophet, but Deuteronomy 18:18 rule him out.