Genesis 11:12 Kabbalah

וְאַרְפַּכְשַׁ֣ד חַ֔י חָמֵ֥שׁ וּשְׁלֹשִׁ֖ים שָׁנָ֑ה וַיּ֖וֹלֶד אֶת־שָֽׁלַח׃

And Arpachshad lived five and thirty years, and begot Shelah.

Read kabbalistic (mystical) interpretation of Genesis 11:12: and classical mystical sources.