Reference for Pirkei Avot 1:18

רַבָּן שִׁמְעוֹן בֶּן גַּמְלִיאֵל אוֹמֵר, עַל שְׁלשָׁה דְבָרִים הָעוֹלָם עוֹמֵד, עַל הַדִּין וְעַל הָאֱמֶת וְעַל הַשָּׁלוֹם, שֶׁנֶּאֱמַר (זכריה ח) אֱמֶת וּמִשְׁפַּט שָׁלוֹם שִׁפְטוּ בְּשַׁעֲרֵיכֶם:

R. Shimon b. Gamliel says: On three things the world subsists [(This is not like "the world stands on three things" (viz. 1:2)]: on justice [to exonerate the innocent and incriminate the guilty], and on truth, [that one not cheat his friend], and on peace, as it is written (Zechariah 8:16): "(With) truth and justice and peace shall you judge in your gates."]

Jastrow