瑜伽師地論略纂 10.75

10.75

論云「雖有力能，彼若求請乃至非無欲樂」者，謂有有情於己有恩，隨己力能，現前酬報；雖無力能，他若來請，隨彼彼事示現殷重而為作之，不以無力能止他請。如何令他知我無力，我但無力，非無欲樂者，意知息故，欲得酬報。

The treatise states: "Although possessing the ability, if that person requests [...] up to [...] it is not that there is no wishful joy": this means that if there are sentient beings who have been kind to oneself, according to one's own ability, one directly repays them; even if one lacks the ability, if another comes to request, according to those various matters one manifests earnest sincerity and acts on their behalf, not stopping another's request simply because of lacking ability. How does one make another know that I lack the ability? "I merely lack the ability, but it is not that I have no wishful joy" means that wishing the [other's request] to be settled, one desires to repay.