Genesis 30:12 Kabbalah

וַתֵּ֗לֶד זִלְפָּה֙ שִׁפְחַ֣ת לֵאָ֔ה בֵּ֥ן שֵׁנִ֖י לְיַעֲקֹֽב׃

And Zilpah Leah’s handmaid bore Jacob a second son.

Read kabbalistic (mystical) interpretation of Genesis 30:12: and classical mystical sources.