וַאֲשֶׁר֙ לֹ֣א צָדָ֔ה וְהָאֱלֹהִ֖ים אִנָּ֣ה לְיָד֑וֹ וְשַׂמְתִּ֤י לְךָ֙ מָק֔וֹם אֲשֶׁ֥ר יָנ֖וּס שָֽׁמָּה׃ (ס)
And if a man lie not in wait, but God cause it to come to hand; then I will appoint thee a place whither he may flee.
Read Jewish philosophy on Exodus 21:13: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.