佛遺教經論疏節要 1.289

1.289

縛著沒苦，煩惱業染生也。老象喻縛著，溺泥喻眾苦。象故身重，縛著厚也。老故溺泥，觀智微也，所以溺眾苦泥不能自出。

“Bound and attached, one sinks in suffering”: this is the defilement of karma arising. The old elephant illustrates being bound and attached; the mire of mud illustrates all kinds of suffering. Being an elephant, its body is heavy: attachment is dense. Being old, it sinks in the mud: contemplative wisdom is weak. Therefore, sinking in the mud of all kinds of suffering, it cannot free itself.