阿彌陀經通贊疏 2.117

2.117

問：「濁世眾生業重難化，教說三乘；淨土人眾信深易勸，何言四果？」

Question: 'The sentient beings of the defiled world have heavy karma and are difficult to convert, so the teachings speak of the three vehicles; the assembly in the Pure Land has deep faith and is easy to encourage, so why speak of the four fruits?'