妙法蓮華經玄義 10.185

10.185

又《涅槃經》有大利益，如《法華》中，八千聲聞得受記莂，成大果實。若以法華得記，證涅槃之益，即是理同，教無深淺明矣。

Furthermore, the Nirvāṇa Sūtra possesses great benefits, just as in the Lotus Sūtra, eight thousand śrāvakas received vyākaraṇa and achieved the great fruit. If one uses the receiving of prediction in the Lotus Sūtra to corroborate the benefit of the Nirvāṇa Sūtra, then the principle is identical, and it is clear that the teachings have no shallowness or depth.