法華義疏 10.127

10.127

前明五十小劫即是半日，既是近遠無二，今類此可知。竺道生云：「言彼長者即伽耶是也。伽耶是者即非復伽耶。伽耶既非，彼長者何獨是乎！然則長短斯忘長短存焉」，蓋是古舊之說，勿得疑之。

Earlier it was explained that fifty minor kalpas were just half a day; since near and far are non-dual, this case can be understood by analogy. Zhu Daosheng said: "Calling that one an elder is precisely this Gayā. Since Gayā is this, it is no longer Gayā. If Gayā is not [merely this], how could that elder alone be so? Therefore, when both long and short are forgotten, long and short are preserved." This is indeed an ancient explanation; do not doubt it.