Mahabharata 1.206.21

अर्जुन उवाच · arjuna uvāca

ब्रह्मचर्यमिदं भद्रे मम द्वादशवार्षिकम्धर्मराजेन चादिष्टं नाहमस्मि स्वयंवशः

brahmacaryamidaṃ bhadre mama dvādaśavārṣikamdharmarājena cādiṣṭaṃ nāhamasmi svayaṃvaśaḥ

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