וַיֹּ֥אמֶר קַ֖יִן אֶל־הֶ֣בֶל אָחִ֑יו וַֽיְהִי֙ בִּהְיוֹתָ֣ם בַּשָּׂדֶ֔ה וַיָּ֥קָם קַ֛יִן אֶל־הֶ֥בֶל אָחִ֖יו וַיַּהַרְגֵֽהוּ׃
Caïn parla à son frère Abel; mais il advint, comme ils étaient aux champs, que Caïn se jeta sur Abel, son frère, et le tua.
Zohar
Mark this! As Job kept evil separate from good and failed to fuse them, he was judged accordingly: first he experienced good, then what was evil, then again good. For man should be cognizant of both good and evil, and turn evil itself into good. This is a deep tenet of faith.