Source: Mishneh Torah by Rambam, Hilchot Kiddush HaChodesh · Steinsaltz Commentary (Koren) · Touger Translation (Moznaim)
"Seek from the book of God and read — not one of these shall be missing" (19:16)

The vocalized text of Hilchot Kiddush HaChodesh and the commentary by Rabbi Adin Even-Israel (Steinsaltz) are taken from the William Davidson Digital Edition of the Koren-Noé Talmud, courtesy of Sefaria (Sefaria.org).
These contents are available for free use under the CC-BY-NC license — permitted to use, share and adapt, with credit attribution and non-commercial use.