Isaiah 66:23

23 "Every month on Rosh-Hodesh and every week on Shabbat, everyone living will come to worship in my presence," says ADONAI.

Isaiah 66:23 In-Context

21 I will also take cohanim and L'vi'im from them," says ADONAI.
22 "For just as the new heavens and the new earth that I am making will continue in my presence," says ADONAI, "so will your descendants and your name continue.
23 "Every month on Rosh-Hodesh and every week on Shabbat, everyone living will come to worship in my presence," says ADONAI.
24 "As they leave, they will look on the corpses of the people who rebelled against me. For their worm will never die, and their fire will never be quenched; but they will be abhorrent to all humanity." ["Every month on Rosh-Hodesh and every week on Shabbat, everyone living will come to worship in my presence," says ADONAI.]
Complete Jewish Bible Copyright 1998 by David H. Stern. Published by Jewish New Testament Publications, Inc. All rights reserved. Used by permission.