ŚBM, 3, 7, 1, 8.2 tejo ha vā etadvanaspatīnāṃ yad bāhyāśakalas tasmād yadā bāhyāśakalam apatakṣṇuvanty atha śuṣyanti tejo hyeṣāmetat tad yad yūpaśakalam prāsyati satejasam minavānīti tadyadeṣa eva bhavati nānya eṣa hi yajuṣkṛto medhyas tasmād yūpaśakalam prāsyati //