菩薩戒義疏 2.49

2.49

第三十一、不行救贖戒。見有賣佛菩薩形像不救贖，損辱之甚，非大士行。應隨力救贖，不者犯罪，故制。七眾同，大小不全共。菩薩應贖，聲聞見父母不贖，犯第七聚，經像不見制。序事有三：先能賣之人，謂劫賊。所賣即佛菩薩形像，此有父母，有大慈故。「而菩薩」下，第三、正應救贖也。

Thirty-first: the precept against failing to redeem. Seeing an image of a Buddha or bodhisattva being sold and failing to redeem it is an extreme humiliation, not the conduct of a mahāsattva. One should redeem it according to one's capability; failing to do so constitutes an offense, hence it was instituted. It is the same for the seven assemblies; Mahāyāna and Hīnayāna do not fully share it. Bodhisattvas must redeem them; if a śrāvaka sees their parents and does not redeem them, they commit an offense of the seventh category, but no prohibition is seen regarding scriptures or images. The narrative of events has three parts: First, the person capable of selling, meaning robbers. What is sold is the images of Buddhas and bodhisattvas; these are treated like parents because of great compassion. From "Yet a bodhisattva..." onward is the third, properly explaining that one should redeem them.