51 Rosh Chodesh Readings

B'midbar 10:10
uveyom simkhatkhem uvemoadeikhem uverashei khadshekhem utekatem bakhatsotsrot al oloteikhem veal zivkhei shalmeikhem vehayu lakhem lezikaron lifnei eloheikhem ani adonai eloheikhem:
Yeshayahu 66:23
vehaya midei-khodesh bekhadsho umidei shabat beshabato yavo khol-basar lehishtakhavot lefanai amar adonai:
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Bamidbar (Numbers) 10:10
"Also on your days of rejoicing, at your designated times and on Rosh Chodesh, you are to sound the trumpets over your burnt offerings and over the sacrifices of your peace offerings; these will be your reminder before your G-d." Sound the shofar at Rosh Chodesh and at full moon for the pilgrim feasts, because this is law for Israel, a ruling of the G-d of Ya'acov. AND IT IS WRITTEN...
Yeshayahu (Isaiah) 66:23
"Every month on Rosh Chodesh and every week on Shabbat, everyone living will come to worship in my presence, says Adonai"