전도서 1:4의 Kabbalah

It was through this small Hei, the Hei of Abraham, which is the letter Hei in BeHibar'am that Moses received assistance, and it is written of him: "That caused His glorious arm to go at the right hand of Moses" (Isaiah) 63:12). He took it from there (from among the kelipot) by the power of the letter Vav and brought it with him. Immediately, Yud-Hei rested on it and the vow was fulfilled: "For Yah has sworn by His throne (Heb. Kes, Caf-Samech) that Hashem will have war" (Shemot 17:16). What is "From generation to generation"? This is Moses, about whom it is written: "One generation passes away, and another generation comes..." (Kohelet 1:4). It has already been explained that one generation contains no fewer than 600,000. This refers to Moses, about whom it is said that one woman gave birth in Egypt to 600,000 in one belly (meaning Moshe, who equals 600,000 souls).