首楞嚴義疏注經 5.254

5.254

畢陵伽婆蹉，云餘習。呼恒河神為小婢，非是故心，由過去世為婆羅門我慢餘習耳。最初入道，聞佛所說世間苦、空、無常、不淨都不可樂，因行乞食，思入此觀，忽遇苦緣，故云疼痛。

Pilindavatsa is translated as 'Residual Habit'. His addressing the Ganges river spirit as a 'little maidservant' was not done with deliberate intent, but was due to the residual habit of pride from having been a brāhmaṇa in past lives. When he first entered the Path, he heard the Buddha speak of worldly suffering, emptiness, impermanence, and impurity as entirely joyless. While walking and begging for food, he reflected and entered into this contemplation, when suddenly encountering conditions of suffering; hence it says 'pain throughout my whole body'.