Kiddushin 38A

אקרוב עומר והדר אכול.

they sacrificed the omer and only afterward did they eat.

אלא למאן דאמר לאחר ירושה וישיבה, ניכול לאלתר! לא הוו צריכי,

But according to the one who says that the term residence indicates that the prohibition of the new crop applies only after inheritance and settlement of Eretz Yisrael, let the Jews eat the produce of the land immediately. The Talmud answers: They did not need to eat the new produce, as they still had manna. Although they did not eat the new crop of Eretz Yisrael, the reason was not that it was prohibited.

דכתיב ״ובני ישראל אכלו את המן ארבעים שנה עד באם אל ארץ נושבת, את המן אכלו עד באם אל קצה ארץ כנען״. אי אפשר לומר ״עד באם אל ארץ נושבת״, שכבר נאמר ״אל קצה ארץ כנען״. ואי אפשר לומר ״אל קצה ארץ כנען״, שהרי כבר נאמר: ״עד באם אל ארץ נושבת״. הא כיצד? בשבעה באדר מת משה ופסק מן מלירד, והיו מסתפקין ממן שבכליהם עד ששה עשר בניסן.

This is as it is written: “And the children of Israel ate the manna 40 years until they came to a settled land; they ate the manna until they came to the borders of the land of Canaan” (Exodus 16:35). The Talmud analyzes this verse: One cannot say they ate “until they came to a settled land,” i.e., that they were still eating the manna when they entered Eretz Yisrael, as it is already stated: “To the borders of the land of Canaan,” which indicates that they stopped eating manna before entering Eretz Yisrael, on the plains of Moab. And one cannot say that they ate manna only until they reached “to the borders of the land of Canaan,” as it is already stated: “Until they came to a settled land.” How can these clauses be reconciled? Moses died on the 7th of Adar and the manna ceased falling, and they ate the manna that was left in their vessels until the 16th of Nisan, even after they entered Eretz Yisrael.