Isaiah 66:23

23 On every New Moon Festival and every Sabbath people of every nation will come to worship me here in Jerusalem," says the Lord.

Isaiah 66:23 In-Context

21 I will make some of them priests and Levites.
22 "Just as the new earth and the new heavens will endure by my power, so your descendants and your name will endure.
23 On every New Moon Festival and every Sabbath people of every nation will come to worship me here in Jerusalem," says the Lord.
24 "As they leave, they will see the dead bodies of those who have rebelled against me. The worms that eat them will never die, and the fire that burns them will never be put out. The sight of them will be disgusting to all people."
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.