John Gills Exposition of the Bible Commentary - Deuteronomy 18:18
I will raise them up a prophet from among their brethren like unto thee ,.... So that it seems this promise or prophecy was first made at Mount Sinai, but now renewed and repeated, and which is nowhere else recorded; see Deuteronomy 18:15 when they were not only made easy for the present by appointing Moses to receive from the Lord all further notices of his mind and will, but were assured that when it was his pleasure to make a new revelation, or a further discovery of his mind and will,... read more
Matthew Henry's Complete Commentary - Deuteronomy 18:15-22
Here is, I. The promise of the great prophet, with a command to receive him, and hearken to him. Now, 1. Some think it is the promise of a succession of prophets, that should for many ages be kept up in Israel. Besides the priests and Levites, their ordinary ministers, whose office it was to teach Jacob God's law, they should have prophets, extraordinary ministers, to reprove them for their faults, remind them of their duty, and foretel things to come, judgments for warning and deliverances... read more