瑜伽論記 9.80

9.80

第四真實中，景云：言謂於所知能礙智故，名所知障者，此釋所知障名。謂事中無知及與法執現行及種皆有勢力，能令身心不得安穩，能礙於智不達所知，名所知障。

Regarding the fourth reality, Jing says: The statement, "Because it can obstruct knowledge with respect to knowables, it is called the obstruction to knowables," explains the name of the obstruction to knowables. It means that ignorance regarding facts and grasping at phenomena, both active manifestations and seeds, possess power that can make the body and mind fail to attain tranquility and can obstruct knowledge from penetrating knowables; thus it is called the obstruction to knowables.