Rigveda 1.51.15

इ॒दं नमो॑ वृष॒भाय॑ स्व॒राजे॑ स॒त्यशु॑ष्माय त॒वसे॑ऽवाचि ।अ॒स्मिन्नि॑न्द्र वृ॒जने॒ सर्व॑वीरा॒: स्मत्सू॒रिभि॒स्तव॒ शर्म॑न्त्स्याम॥

idaṃ namo vṛṣabhāya svarāje satyaśuṣmāya tavase'vāci |asminnindra vṛjane sarvavīrā: smatsūribhistava śarmantsyāma ||

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