Psalm 81:4

New English Translation

For observing the festival is a requirement for Israel; it is an ordinance given by the God of Jacob.

Cross References

Numbers 10:10

“Also in the time when you rejoice, such as on your appointed festivals or at the beginnings of your months, you must blow with your trumpets over your burnt offerings and over the sacrifices of your peace offerings, so that they may become a memorial for you before your God: I am the Lord your God.”

Numbers 28:11

“‘On the first day of each month you must offer as a burnt offering to the Lord two young bulls, one ram, and seven unblemished lambs a year old,