瑜伽論記 12.266

12.266

二論相望可有四句：一、此合彼離如跟趺等；二、彼合此離如身不曲等；三、彼此俱合如七處滿等；四、此彼俱離除上三句。頂上烏瑟膩沙者，是重頂骨，如來冠髮中有重頂骨，存其梵音名烏瑟膩沙。

When comparing the two treatises, there are four alternatives: 1. combined in this one and separated in that one, such as the heel and instep; 2. combined in that one and separated in this one, such as the body being unbent; 3. combined in both, such as the seven places being full; 4. separated in both, excluding the three alternatives above. Regarding the 'uṣṇīṣa on the crown of the head': this is a double cranial bone; within the coiffured hair of the Tathāgata there is a double cranial bone, and preserving its Sanskrit sound, it is called uṣṇīṣa.