Lailah (לַיְלָה) - the female angel called "Night," who governs fertility!
Babylonian Talmud, Niddah 16a and 16b:
halakhah.com/niddah/niddah_…
Schwartz, Howard. Gabriels Palace: Jewish Mystical Tales. Oxford University Press, 1994.
books.google.com/books?id=jglAD…
Babylonian Talmud, Tractate Sanhedrin 96a:
come-and-hear.com/sanhedrin/sanh…
archive.org/details/ADicti…