1 Chronicles 23:31
and to offer all burnt offerings to Yahweh, on the Sabbaths, on the new moons, and on the set feasts, in number according to the ordinance concerning them, continually before Yahweh;
Isaiah 1:13-14
Bring no more vain offerings. Incense is an abomination to me; new moons, Sabbaths, and convocations: I can't bear with evil assemblies.
Leviticus 23:1-17
Yahweh spoke to Moses, saying,
Leviticus 23:24
"Speak to the children of Israel, saying, 'In the seventh month, on the first day of the month, shall be a solemn rest to you, a memorial of blowing of trumpets, a holy convocation.
Leviticus 23:39
"'So on the fifteenth day of the seventh month, when you have gathered in the fruits of the land, you shall keep the feast of Yahweh seven days: on the first day shall be a solemn rest, and on the eighth day shall be a solemn rest.
Numbers 10:10
"Also in the day of your gladness, and in your set feasts, and in the beginnings of your months, you shall blow the trumpets over your burnt offerings, and over the sacrifices of your peace offerings; and they shall be to you for a memorial before your God. I am Yahweh your God."
Numbers 28:1-29
Yahweh spoke to Moses, saying,
Psalm 81:1-4
Sing aloud to God, our strength! Make a joyful shout to the God of Jacob!