菩薩瓔珞本業經 1.62

1.62

「佛子！九、能受佛法僧故。所謂二諦空：因緣集故謂之有，非曰有是有。因緣散故謂之無，非曰有是無。故有無無無，般若解脫無二相故。

"Buddha-son! Ninth is being able to accept the Buddha, Dharma, and Saṅgha, that is to say, the emptiness of the two truths: because causes and conditions aggregate, it is called existence, but that does not mean that existence is truly existent; because causes and conditions disperse, it is called non-existence, but that does not mean that existence is truly non-existent. Therefore, existence is non-existence and non-existence is non-existence, because prajñā and liberation are of a non-dual mark.