English: “That you sow” — I have only [the case of] one who himself sowed. Whence [do I include] one who finds his fellow’s sowing and wishes to maintain it? Scripture states “you sow” — in any case.
On the daf / in context: The obligation (and the resulting issur) applies not only to the original sower but also to one who allows the mixed growth to remain.
Type of Learning
Ribbui from the verb “tizra.”
What Is Learned
One who maintains kilayim that another person sowed is also in violation.