וְהִשְׁתַּחֲו֣וּ עַם־הָאָ֗רֶץ פֶּ֚תַח הַשַּׁ֣עַר הַה֔וּא בַּשַּׁבָּת֖וֹת וּבֶחֳדָשִׁ֑ים לִפְנֵ֖י יְהוָֽה׃
Likewise the people of the land shall worship at the door of that gate before the LORD in the sabbaths and in the new moons.
Read kabbalistic (mystical) interpretation of Ezekiel 46:3: and classical mystical sources.