俱舍論記 2.61

2.61

「論曰至有所緣等」者，緣謂攀緣。心、心所法名能緣。境是所緣，有彼所緣名有所緣，如人有子。心、心所法其性羸劣，執境方起，猶如羸人非杖不行。

Regarding "The commentary says: ... having an intentional object, etc.": An objective condition (ālambana) means seizing an object. Mind and mental factors are called that which grasps the object (ālambaka). The cognitive object is the intentional object (ālambana); possessing that intentional object, it is called having an intentional object (sālambana), just as a person has a child. The nature of mind and mental factors is frail; they arise only by grasping an object, just as a frail person cannot walk without a staff.