דַּבֵּ֞ר אֶל־בְּנֵ֤י יִשְׂרָאֵל֙ וְאָמַרְתָּ֣ אֲלֵהֶ֔ם כִּֽי־תָבֹ֣אוּ אֶל־הָאָ֗רֶץ אֲשֶׁ֤ר אֲנִי֙ נֹתֵ֣ן לָכֶ֔ם וּקְצַרְתֶּ֖ם אֶת־קְצִירָ֑הּ וַהֲבֵאתֶ֥ם אֶת־עֹ֛מֶר רֵאשִׁ֥ית קְצִירְכֶ֖ם אֶל־הַכֹּהֵֽן׃
Berbicaralah kepada bani Israel dan katakanlah kepada mereka: Apabila kamu masuk ke negeri yang Kuberikan kepadamu, dan kamu menuai hasilnya, maka haruslah kamu membawa satu omer, yaitu hasil pertama dari tuaianmu, kepada imam.
Mishnah Challah
Five species [of grains] are subject to [the law of] hallah: wheat, barley, spelt, oats and rye. These are subject to hallah, and [dough made from different types of these grains] are accounted together one with another [as one quantity]. And their “new” [harvest] is prohibited prior to Pesah, and [they are subject] to [the prohibition of] reaping prior to the Omer. If they took root prior to the Omer, the omer permits them. If not, they are prohibited until the next Omer has come.
Mishnah Kelim
There are ten grades of holiness: the land of Israel is holier than all other lands. And what is the nature of its holiness? That from it are brought the omer, the firstfruits and the two loaves, which cannot be brought from any of the other lands.
Mishnah Parah
Rabbi Eliezer says: a [red] cow for the hatat that is pregnant is valid, But the sages say: it is invalid. Rabbi Eliezer says: it may not be bought from non-Jews, But the sages say: it is valid. And not only this, but all sacrifices of the congregation or the individual may be brought from the land of Israel and from outside the land, from new produce and from the old; Except the omer and the two loaves, which may be brought only from new produce and from within the land.