Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 147
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 147, with English translation by Maimonides (Rambam).
לכסות דם חיה ועוף, שנאמר: "ושפך, את דמו, וכיסהו, בעפר" (ויקרא יז,יג).
To cover the blood of beasts and fowl [which are slaughtered], as [Leviticus 17:13] states: "And you shall pour out its blood and cover it with dust."