וַיְחִ֤י אִיּוֹב֙ אַֽחֲרֵי־זֹ֔את מֵאָ֥ה וְאַרְבָּעִ֖ים שָׁנָ֑ה וירא [וַיִּרְאֶ֗ה] אֶת־בָּנָיו֙ וְאֶת־בְּנֵ֣י בָנָ֔יו אַרְבָּעָ֖ה דֹּרֽוֹת׃
And after this Job lived a hundred and forty years, and saw his sons, and his sons’sons, even four generations.
Read kabbalistic (mystical) interpretation of Job 42:16: and classical mystical sources.