Talmud for Chagigah 3:6

הַגַּבָּאִין שֶׁנִּכְנְסוּ לְתוֹךְ הַבַּיִת, וְכֵן הַגַּנָּבִים שֶׁהֶחֱזִירוּ אֶת הַכֵּלִים, נֶאֱמָנִין לוֹמַר, לֹא נָגָעְנוּ. וּבִירוּשָׁלַיִם נֶאֱמָנִין עַל הַקֹּדֶשׁ, וּבִשְׁעַת הָרֶגֶל אַף עַל הַתְּרוּמָה:

Collectors [Jews, amei ha'aretz, who are deputed by the king to collect taxes from other Jews], who entered the house [to take the pledge], and likewise, thieves, who returned [earthenware] vessels [that they stole] are believed to say: "We did not touch them" [on the inside. This, if they returned them in voluntary penance, but not out of fear.] And in Jerusalem they are believed in respect to kodesh. [They are believed for all earthenware, both large and small, to say that they are clean for kodesh; for they do not make (potters') ovens in Jerusalem. For this reason they believed them and did not decree against them.] And, during the time of the festival, (they were believed) even for terumah, [it being written (Judges 20:11): "And all the men of Israel gathered together against the city as one man, chaverim." When they are all gathered together, Scripture calls them "chaverim." And a festival is a time of gathering.]

Jerusalem Talmud Bava Kamma