Shatapatha Brahmana 9.1.1.14

9.1.1.14

namaste rudra manyava iti | ya evāsmintso 'ntarmanyurvitato 'tiṣṭhattasmā etannamaskarotyuto ta iṣave namo bāhubhyāmuta te nama itīṣvā ca hi bāhubhyāṃ ca bhīṣayamāṇo 'tiṣṭhat

[He offers, with, Vâg. S. XVI, 1], 'Reverence, O Rudra, be to thy wrath!' he thereby does reverence to that wrath which remained extended within him;--'And to thine arrow be reverence, and to both thine arms be reverence!' for it was by his arrow and his arms that he was inspiring fear.