It happened that R' Shimon of Mitzpah planted in the time of Rabban Gamliel, and they ascended to the Chamber of Hewn Stone and inquired. Said Nachum the Scribe: I have received from Rabbi Meyasha, who received from father, who received from the pairs, who re- ceived from the prophets, a law transmitted to Moses at Sinai concerning one who plants his field with two varieties of wheat, that if he makes one harvest, he gives one peah; two harvests, he gives two peahs.