1 Chronicles 23:31
and whenever burnt sacrifices were offered to the Lord on the Sabbath and at new moon festivals and assemblies. A designated number were to serve before the Lord regularly in accordance with regulations.
Isaiah 1:13-14
Do not bring any more meaningless offerings; I consider your incense detestable! You observe new moon festivals, Sabbaths, and convocations, but I cannot tolerate sin-stained celebrations!
Leviticus 23:1-17
The Lord spoke to Moses:
Leviticus 23:24
"Tell the Israelites, 'In the seventh month, on the first day of the month, you must have a complete rest, a memorial announced by loud horn blasts, a holy assembly.
Leviticus 23:39
"'On the fifteenth day of the seventh month, when you gather in the produce of the land, you must celebrate a pilgrim festival of the Lord for seven days. On the first day is a complete rest and on the eighth day is complete rest.
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 28:1-29
The Lord spoke to Moses:
Psalm 81:1-4
For the music director; according to the gittith style; by Asaph. Shout for joy to God, our source of strength! Shout out to the God of Jacob!