增壹阿含經 31.8.p42

31.8.p42

“Therefore, monks, you should seek the methods for achieving these four things. The reason for that is if monks attain these four things, they’ll achieve awakening without difficulty. As I have today, they’ll achieve the unsurpassed, correct, and true awakening. As a result of these four things, they’ll attain this fruit. Thus, monks, should you train.”