Part 16 · Chapter 248

And indeed, the matter of the intermingling of good and evil mentioned above, which is in the three worlds Beriah, Yetzirah, Assiyah, is not, Heaven forbid, in the ten Sefirot that nest in them, as is known, for Ima nests in the three Sefirot of Beriah, etc. But the intermingling is in the worlds themselves.