ראש חדש א

This is in accordance with what Rabeinu, may his light shine, wrote — that the aspect of Tamid (the daily offering) is the rectification of prayer, in the aspect of t'fillos k'neged t'midin tik'num — "the prayers were instituted corresponding to the daily offerings" — see there. Now, the blemish of prayer comes about through the blemish of the moon, for the moon is the aspect of Malchus (Kingship), the aspect of prayer. Therefore, on Rosh Chodesh, when the Holy One, blessed be He, said "Bring an atonement upon Me", then the rectification of the moon begins — for then it begins to become full again. For this reason we read the Parshas HaTamid at that time, for it is the aspect of the rectification of prayer as mentioned above; because on Rosh Chodesh the rectification of the moon begins, which is the rectification of prayer as mentioned above.