וַיִּֽחַר אַ֧ף יְהוָ֛ה בָּ֖ם וַיֵּלַֽךְ׃
And the anger of the LORD was kindled against them; and He departed.
Read Jewish philosophy on Numbers 12:9: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.