瑜伽師地論略纂 12.167

12.167

論云「第三住中得勝意樂，趣向前行勝修行相」者，即攝第六法一分。以初地中得無相，趣向無相之前行，故得一分。

Regarding the treatise's statement, "In the third stage, one attains superior intention, the modes of superior cultivation as preliminary practices toward the goal": this subsumes a portion of the sixth dharma. Because on the first bhūmi one attains the signless, which is the preliminary practice toward the signless, it attains one portion.