Reference for Tahorot 2:4

הָרִאשׁוֹן וְהַשֵּׁנִי שֶׁבַּתְּרוּמָה טְמֵאִין וּמְטַמְּאִין. הַשְּׁלִישִׁי, פּוֹסֵל וְלֹא מְטַמֵּא. וְהָרְבִיעִי, נֶאֱכָל בִּנְזִיד הַקֹּדֶשׁ:

<i>Terumah</i> of a first or second degree is impure and can render [other things] impure. [<i>Terumah</i>] of a third degree, is invalid [literally: renders invalid], but does not render impure. And that of fourth degree can be eaten in a soup containing sanctified foods.

Jastrow

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