俱舍論記 11.93

11.93

「所說諸天至得究竟名」者，此下明天器近遠。就中，一正明器近遠、二明下天昇上。此即正明器近遠。欲界六天、色界十六，總二十二，相去可知。

"The devas spoken of... acquire the name of culmination (Akaniṣṭha)": below this explains the proximity and distance of the heavenly receptacles. Within this: first, directly explaining the proximity and distance of the receptacles; second, explaining the ascent of lower devas to the higher ones. This directly explains the proximity and distance of the receptacles. The six heavens of the desire realm and the sixteen of the form realm make twenty-two in total; the distances between them can be known.