俱舍論頌疏論本 9.21

9.21

及卵恒無知者，此前四位唯說胎生。若卵生者，入胎等位三時不知，名恒無知。恒無知，同前胎生第四位，故頌言「及」也。問：「如何卵生言入胎藏？」答：「謂卵生者先必入胎，從初名說。或可卵言據當名說，謂先入胎，後從卵生，說胎名卵，據當名說。如煮米時即言煮飯，據當名也。」

Regarding "as are the egg-born ever unconscious", the previous four states speak only of womb-born beings. For egg-born beings, throughout the three periods of entering the womb and so forth, they are unconscious; this is called "ever unconscious". "Ever unconscious" is identical to the fourth state of womb-born beings previously mentioned, hence the verse says "as are". Question: "How can egg-born beings be spoken of as entering the womb?" Answer: "Because egg-born beings must first enter the womb, it is spoken of based on the initial stage. Or it may be that the word 'egg' is spoken based on the future designation; that is, first entering the womb and later being born from an egg, the womb is called an egg based on the future designation. Just as when cooking raw rice one says 'cooking cooked rice', it is based on the future designation."