1 Chronicles 23:31
and for every burnt offering offered to Yahweh, on Sabbaths, on new moon festivals, and at the appointed feasts, according to the customary number {required of them}, regularly before Yahweh.
Isaiah 1:13-14
You must not {continue} to bring offerings of futility, incense--it [is] an abomination to me; new moon and Sabbath, [the] calling of a convocation-- I cannot endure iniquity with [solemn] assembly.
Leviticus 23:1-17
Then Yahweh spoke to Moses, saying,
Leviticus 23:24
"Speak to the {Israelites}, saying, 'In the seventh month, on [the] first [day] of the month, {you must have} a rest period, a remembrance of [the trumpet] blast, a holy assembly.
Leviticus 23:39
" 'Surely on the fifteenth day of the seventh month, at your gathering the land's produce, you shall hold Yahweh's festival for seven days; on the first day [there shall be] a rest period and on the eighth day a rest period.
Numbers 10:10
"And on the day of your joy and in your appointed times, at the beginning of your months, you will blow on the trumpets in addition to your burnt offerings and in addition to the sacrifices of your fellowship offerings. And they will be as a memorial for you {before} your God; I [am] Yahweh your God."
Numbers 28:1-29
Yahweh spoke to Moses, saying,
Psalm 81:1-4
Shout out to God our strength; shout joyfully to the God of Jacob.