Deuteronomy 19:4 Kabbalah

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;