Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 8.5.15

8.5.15

bhavā no agne sumanā upetau tapo ṣv agne antarām amitrān yo naḥ sanutyo abhidāsad agna iti tisras tapasvatīr abhirūpā abhiṣṭauti / (soma: pravargya)

With 'Be well-disposed to us, O Agni, at our approach', 'Burn away completely, O Agni, the enemies within', [and] 'He who is secret, O Agni, should assault us', he praises with three appropriate verses containing [forms of the root] tap- ('burn').