2 Kings 4:23
And he said, "Why will you go to him today? It is neither new moon nor Sabbath." She said, "All is well."
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 28:11
"At the beginnings of your months, you shall offer a burnt offering to the LORD: two bulls from the herd, one ram, seven male lambs a year old without blemish;
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 1:13-15
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.