1 Chronicles 23:31
whenever burnt offerings are presented to the LORD, whether on Sabbaths, New Moons, or scheduled festivals, regularly in the LORD's presence in accordance with the number required to conduct their service.
Isaiah 1:13-14
Stop bringing useless offerings! Incense is detestable to me, as are your New Moons, Sabbaths, and calling of convocations. I cannot stand iniquity within a solemn assembly.
Leviticus 23:1-17
The LORD told Moses,
Leviticus 23:24
"Tell the Israelis that on the first day of the seventh month you are to have a Sabbath of rest for you a memorial announced by a loud blast of trumpets. It is to be a sacred assembly.
Leviticus 23:39
"On the fifteenth day of the seventh month, when you've harvested the produce of the land, you are to observe the festival of the LORD for seven days. The first day is to be a Sabbath rest, and the eighth day also is to be a Sabbath rest.
Numbers 10:10
At the beginning of the month, during your time of rejoicing at the appointed place, sound the trumpet over your burnt offering, then sacrifice your peace offering, since they are to be your memorial before the LORD your God. I am the LORD your God."
Numbers 28:1-29
The LORD told Moses,
Psalm 81:1-4
Sing joyfully to God, our strength. Raise a shout to the God of Jacob.