Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 62
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 62, with English translation by Maimonides (Rambam).
למלוח כל קרבן, שנאמר: "עַל כָּל קָרְבָּנְךָ תַּקְרִיב מֶלַח" (ויקרא ב, יג).
To salt all the sacrifices, as [Leviticus 2:13] states: "Offer salt on all your sacrifices."