瑜伽論記 7.91

7.91

釋蘊善巧中，云何想蘊？謂有相無相等者，緣俗諦想名有相，緣勝義想名無相。又緣依他圓成有體之法，名有相。若緣遍計所執無體之法，名無相。緣欲界名小相，緣色界名廣大，緣空識處名無量，無諸所有處等是無所有處。

In explaining skillfulness in the aggregates: 'What is the ideation aggregate? It refers to with signs, without signs,' and so on: ideation taking conventional truth as an object is called 'with signs'; ideation taking ultimate truth as an object is called 'without signs.' Furthermore, taking the paratantra and pariniṣpanna dharmas that have real entity as objects is called 'with signs'; taking parikalpita dharmas that have no real entity as objects is called 'without signs.' Taking the desire realm [as an object] is called small signs; taking the form realm is called vast; taking the spheres of space and consciousness is called boundless; the sphere of nothing whatever and so on is the sphere of nothingness.