俱舍論疏 9.98

9.98

論「已了三受至此位名受」，此出第七受支體也。「已了三受因差別」者，簡前。「未起婬貪」者，簡後。「此位名受」者，此中間五蘊名受。以初能簡受因故，從勝為名。大分即在十歲已還。

The treatise says: "Having already discerned the three feelings... this state is named feeling (vedanā)." This presents the intrinsic nature of the seventh link, vedanā. "Having already discerned the differences among the causes of the three feelings" excludes what precedes. "Not yet having aroused sexual desire" excludes what follows. "This state is named vedanā" means that the five skandhas in this interval are named vedanā. Because one is first able to discern the causes of feeling, it is named after the pre-eminent. Roughly speaking, it is under ten years of age.