Yōga Sūtras
Yōga Sūtra 4.31
तदा सर्वावरणमलापेतस्य ज्ञानस्यानन्त्याज्ज्ञेयमल्पम्।
Then, having dissolved all the veils of impurities, one understands the knowable to be infinite and (our) knowledge is finite.