Mahabharata 12.149.46

यत्नो हि सततं कार्यः कृतो दैवेन सिध्यतिदैवं पुरुषकारश्च कृतान्तेनोपपद्यते

yatno hi satataṃ kāryaḥ kṛto daivena sidhyatidaivaṃ puruṣakāraśca kṛtāntenopapadyate

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