Mahabharata 3.2.79

सिद्धा हि यद्यदिच्छन्ति कुर्वते तदनुग्रहात्तस्मात्तपः समास्थाय कुरुष्वात्ममनोरथम्

siddhā hi yadyadicchanti kurvate tadanugrahāttasmāttapaḥ samāsthāya kuruṣvātmamanoratham

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