首楞嚴義疏注經 10.309

10.309

引前釋成也，即引破想陰文。懸崖、酢物俱不到身，由汝所思，便能生汝口足酸水。若非妄想同類，孰有水等生焉？通倫猶同類也。

This cites the earlier text to complete the explanation; that is, it cites the text that refutes the aggregate of conception. Neither the steep cliff nor the sour object touches the body, yet due to what you contemplate, it can produce the sour ache or water in your mouth and feet. If it were not of the same category as false imagination, what would produce the water and so forth? Tonglun (通倫) means of the same category.