Moses described this day (Heb. Yom Kippur) in chapter 16 more fully for the priests' benefit. Here he stressed the responsibilities of the average Israelite.
This day was a fast rather than a feast. The people were to "humble"themselves (v. 29), which involved fasting (cf. 16:29). God permitted no ordinary work on this day (vv. 28, 30-32). By this He taught the Israelites that the yearly covering of their sins was entirely His work to which they contributed absolutely nothing (cf. Eph. 2:8-9).
The sacrifices the priests made on this day atoned for all the remaining sins of the believing Israelites that other sacrifices did not cover. However the benefits of the Day of Atonement lasted for only one year.
Prophetically this day will find fulfillment at the second coming of Christ. Then God will purify His people who have returned to Him in repentance and self-affliction as a result of His chastening during the Tribulation period (Zech. 12:10; 13:1; cf. Heb. 9:28).
"The release from the pressure of work and social inequalities, experienced on and through the Sabbath and its sister institutions, could effectively epitomize both past and future divine deliverance."262