無量壽經優婆提舍願生偈註 2.156

2.156

諸法各有障礙相，如風能障靜、土能障水、濕能障火，五黑十惡障人天、四顛倒障聲聞果。此中三種不遠離障菩提心應知者，若欲得無障，當遠離此三種障礙也。

All phenomena each have their own obstructive characteristics: just as wind can obstruct stillness, earth can obstruct water, and moisture can obstruct fire; the five dark deeds and the ten unwholesome actions obstruct [rebirth as] humans and gods; and the four inversions obstruct the fruit of the śrāvaka. Here, that the three kinds of minds that do not stay far away from obstructing bodhi should be known means that if one wishes to be unobstructed, one must stay far away from these three kinds of obstructions.