無量壽經連義述文贊 2.193

2.193

經曰「假使十方」至「知其限極」者，述云：此後、寄事顯長也。有說：梵云馱演那，此云靜慮。昔云禪那或云禪，皆訛略也。雖知昔禪即今靜慮，未聞禪字復有所目，良可悲故。今即禪思者，專思之別言也。

On the sūtra passage from "Even if all beings in the ten directions" to "know its limit": The Commentary states: This second part reveals its length by relying on an analogy. Some say: In Sanskrit it is *dhyāna*, here translated as "still contemplation" (calm reflection). Formerly it was called *channa* or *chan*, which were both corrupt abbreviations. Although one may know that the former *chan* is the present "still contemplation," to have never heard that the character *chan* has another meaning is truly lamentable. Now, "meditative thinking" (*chansi*) is an alternative expression for concentrated contemplation.