Reference for Menachot 10:2

מִצְוַת הָעֹמֶר לָבֹא מִן הַקָּרוֹב. לֹא בִכֵּר הַקָּרוֹב לִירוּשָׁלַיִם, מְבִיאִים אוֹתוֹ מִכָּל מָקוֹם. מַעֲשֶׂה שֶׁבָּא מִגַּגּוֹת צְרִיפִין, וּשְׁתֵּי הַלֶּחֶם מִבִּקְעַת עֵין סוֹכֵר:

The [best fulfillment of the] commandment of the <i>omer</i> is [that it] come from a nearby land. If [the areas] close to Jerusalem were not yet ripe they could bring them from any place. It once happened that it came from Gaggot Tzrifin and the two loaves came from the valley of Ein Socher.

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