金剛經纂要刊定記 4.33

4.33

問：「如有經云：『佛涅槃時，無色界天淚下如雨。』既有淚下，云何無色？」

Question: "As a certain sūtra says: 'When the Buddha entered nirvāṇa, the devas of the formless realm shed tears like rain.' Since there were tears falling, how can it be formless?"