Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 146
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 146, with English translation by Maimonides (Rambam).
לשחוט בהמה חיה ועוף ואחר כך יאכל בשרם, שנאמר: "וזבחת מבקרך ומצאנך" (דברים יב,כא).
To slaughter an animal, beast, or fowl and afterwards to eat their meat, as [Deuteronomy 12:21] states: "And you shall slaughter your cattle and your sheep."