Part 11 · Chapter 126

The reason is that she too includes ten Sefirot like the male, and just as the male has three times AB, so it is with the Nukva. Therefore this phase is called air, numerically 216, [and] 75, named so because this air includes three times AB — male HaVaYaH spellings — which equal 216. And also within the Gevurot there is one 216, as mentioned. Therefore this phase is called air.