Moses
Numbers 29:40BSB·traditional attribution
So Moses spoke all this to the Israelites just as the LORD had commanded him.
Matthew Henry Presbyterian
Soon after the day of atonement, that day in which men were to afflict their souls, followed the feast of tabernacles, in which they were to rejoice before the Lord; for those that sow in tears shall soon reap in joy.
Commenting on Numbers 29:12-40