Mahabharata 12.328.49

वेदानवाप्य चतुरः साङ्गोपाङ्गान्सनातनान्प्रयोजयामास तदा नाम गुह्यमिदं मम

vedānavāpya caturaḥ sāṅgopāṅgānsanātanānprayojayāmāsa tadā nāma guhyamidaṃ mama

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