Moses
Deuteronomy 31:30KJV·traditional attribution
And Moses spake in the ears of all the congregation of Israel the words of this song, until they were ended.
Matthew Henry Presbyterian
Here, I. The charge is given to Joshua, which God has said (v. 14) he would give him. The same in effect that Moses had given him. The same in effect that Moses had given him (v. 7): Be strong and of a good courage, v. 23.
Commenting on Deuteronomy 31:22-30