Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 6.2.38

6.2.38

yad ugro deva oṣadhayo vanaspatayas tena /

vi. 5. A fourth time he grasped him; he said to him, ‘Why dost thou grasp me?’ He replied, ‘Give me a fourth name, for with three names only I shall not eat food here.’ He answered, ‘Thou art the dread god.’ Since the plants and trees are the dread god, thereby the dread god harms him not, nor his offspring, nor his cattle, nor any one claiming to be his. He who hates him becomes worse, not he who knows thus. His vow is ‘One should not look at the cavity of a woman.’