Mahabharata 13.147.10

भीष्म उवाच · bhīṣma uvāca

धर्मस्य ह्रियमाणस्य बलवद्भिर्दुरात्मभिःसंस्था यत्नैरपि कृता कालेन परिभिद्यते

dharmasya hriyamāṇasya balavadbhirdurātmabhiḥsaṃsthā yatnairapi kṛtā kālena paribhidyate

Our plain-language meaning of this verse is waiting for scholar review.