諸經要集 9.16

9.16

又四分律。親友意者。要具七法方成親友。一難作能作。二難與能與。三難忍能忍。四密事相告。五互相覆藏。六遭苦不捨。七貧賤不輕。如是七法。人能行者。是親善友應親附之。又大莊嚴論佛說偈言。

Furthermore, in the Dharmaguptaka-vinaya, regarding the intent of a close friend, one must be endowed with seven dharmas before becoming a close friend: first, being able to do what is difficult to do; second, being able to give what is difficult to give; third, being able to endure what is difficult to endure; fourth, confiding secret matters to each other; fifth, concealing each other's [faults]; sixth, not abandoning each other when encountering suffering; seventh, not despising each other when poor and lowly. If a person can practice these seven dharmas, they are a close, good friend and one should draw close to them. Furthermore, in the Dazhuangyan lun (Kalpanāmaṇḍitikā), a verse spoken by the Buddha says: