וְזֶה֙ דְּבַ֣ר הָרֹצֵ֔חַ אֲשֶׁר־יָנ֥וּס שָׁ֖מָּה וָחָ֑י אֲשֶׁ֨ר יַכֶּ֤ה אֶת־רֵעֵ֙הוּ֙ בִּבְלִי־דַ֔עַת וְה֛וּא לֹא־שֹׂנֵ֥א ל֖וֹ מִתְּמֹ֥ל שִׁלְשֹֽׁם׃
And this is the case of the manslayer, that shall flee thither and live: whoso killeth his neighbour unawares, and hated him not in time past;
Sifrei Devarim
(Devarim 19:4) "And this is the dvar of the slayer": From here they ruled: If a slayer fled to his city of refuge and the people of that city wished to honor him, he must tell them: "I am a slayer." If they persist, he may accept their homage, (it being written "And this is dvar [lit., "the word"] of the slayer" [i.e., he must tell them "I am a slayer"]).