1 Chronicles 23:31
and whenever burnt offerings were offered to the LORDon Sabbaths, new moons, and feast days, according to the number required of them, regularly before the LORD.
Isaiah 1:13-14
Bring no more vain offerings; incense is an abomination to me. New moon and Sabbath and the calling of convocations-- I cannot endure iniquity and solemn assembly.
Leviticus 23:1-17
The LORD spoke to Moses, saying,
Leviticus 23:24
"Speak to the people of Israel, saying, In the seventh month, on the first day of the month, you shall observe a day of solemn rest, a memorial proclaimed with blast of trumpets, a holy convocation.
Leviticus 23:39
"On the fifteenth day of the seventh month, when you have gathered in the produce of the land, you shall celebrate the feast of the LORD seven days. On the first day shall be a solemn rest, and on the eighth day shall be a solemn rest.
Numbers 10:10
On the day of your gladness also, and at your appointed feasts and at the beginnings of your months, you shall blow the trumpets over your burnt offerings and over the sacrifices of your peace offerings. They shall be a reminder of you before your God: I am the LORD your God."
Numbers 28:1-29
The LORD spoke to Moses, saying,
Psalm 81:1-4
Sing aloud to God our strength; shout for joy to the God of Jacob!