Genesis 30:7 Kabbalah

וַתַּ֣הַר ע֔וֹד וַתֵּ֕לֶד בִּלְהָ֖ה שִׁפְחַ֣ת רָחֵ֑ל בֵּ֥ן שֵׁנִ֖י לְיַעֲקֹֽב׃

And Bilhah Rachel’s handmaid conceived again, and bore Jacob a second son.

Read kabbalistic (mystical) interpretation of Genesis 30:7: and classical mystical sources.