Devata: Yajña and Agni (with ‘the gods’ as invited collective).
Chandas: Undetermined from excerpt alone.
Samhita Patha (Devanagari)
दे॒व॒हूर्य॒ज्ञ आ च॑ वक्षत्सुम्न॒हूर्य॒ज्ञ आ च॑ वक्षत् । यक्ष॑द॒ग्निर्दे॒वो दे॒वाँ२ आ च॑ वक्षत्
Transliteration
devahū́r yajñá ā́ ca vakṣat sumnahū́r yajñá ā́ ca vakṣat | yákṣad agnír devó devā́ṃ̐ ā́ ca vakṣat
Translation
God-inviting may the sacrifice bring (them) hither; boon-inviting may the sacrifice bring (them) hither. May Agni, the god, worship, and bring the gods hither.