Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 216
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 216, with English translation by Maimonides (Rambam).
שלא לזרוע תבואה או ירק בכרם, שנאמר "לא תזרע כרמך, כלאיים" (דברים כב,ט).
Not to sow grain or vegetables in a vineyard, as [Deuteronomy 22:9] states: "Do not plant different species in your vineyard."