Sefer HaMitzvot · Negative Commandments, Chapter 309
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הזהירנו מעבוד ומזרוע בנחל איתן שנערפה בו העגלה. והוא אמרו אשר לא יעבד בו ולא יזרע, והעובר על לאו זה לוקה. ובמכות (דף כ"ב) כשזכרו מחוייבי מלקות אמרו והא איכא זורע נחל איתן ואזהרתיה מהכא אשר לא יעבד בו ולא יזרע. הנה כבר התבאר שהוא לאו אחד ושהוא במלקות, וכבר התבארו משפטי מצוה זו בסוף סוטה. (שופטים, הלכות רוצח פ"י):
He prohibited us from working and planting in the harsh gully in which the calf was beheaded. And that is His saying, "which shall not be worked and which shall not be planted" (Deuteronomy 21:4). And one who transgresses this negative commandment is lashed. And in Makkot (Makkot 22a), when they mentioned those liable for lashes, they said, "But behold, there is [also] planting a harsh gully; and its prohibition is from here - 'which shall not be worked and which shall not be planted!'" Behold it has already been made clear to you that it is [only] one negative commandment, and that it is [punished] with lashes. And the regulations of this commandment have already been explained at the end of Sotah. (See Parashat Shoftim; Mishneh Torah, Murderer and the Preservation of Life 10.)
הזהירנו מעבוד ומזרוע בנחל איתן שנערפה בו העגלה. והוא אמרו אשר לא יעבד בו ולא יזרע, והעובר על לאו זה לוקה. ובמכות (דף כ"ב) כשזכרו מחוייבי מלקות אמרו והא איכא זורע נחל איתן ואזהרתיה מהכא אשר לא יעבד בו ולא יזרע. הנה כבר התבאר שהוא לאו אחד ושהוא במלקות, וכבר התבארו משפטי מצוה זו בסוף סוטה. (שופטים, הלכות רוצח פ"י):
He prohibited us from working and planting in the harsh gully in which the calf was beheaded. And that is His saying, "which shall not be worked and which shall not be planted" (Deuteronomy 21:4). And one who transgresses this negative commandment is lashed. And in Makkot (Makkot 22a), when they mentioned those liable for lashes, they said, "But behold, there is [also] planting a harsh gully; and its prohibition is from here - 'which shall not be worked and which shall not be planted!'" Behold it has already been made clear to you that it is [only] one negative commandment, and that it is [punished] with lashes. And the regulations of this commandment have already been explained at the end of Sotah. (See Parashat Shoftim; Mishneh Torah, Murderer and the Preservation of Life 10.)