Ṛg Veda 1.164.46
इन्द्रं॑ मि॒त्रं वरु॑णम॒ग्निमा॑हु॒रथो॑ दि॒व्यः स सु॑प॒र्णो ग॒रुत्मा॑न् । एकं॒ सद्विप्रा॑ बहु॒धा व॑दन्त्य॒ग्निं य॒मं मा॑त॒रिश्वा॑नमाहुः ॥४६॥
Sat is grammatically neuter:
सत् n. that which really is, entity or existence, essence, the true being or really existent (in the Vedânta, ‘the self-existent or Universal Spirit, Brahma’) .
Is the verse saying what is ultimately real is impersonal, and personal Devas or deities like Indra,Mitra,Varuna et al. spoken of by sages are manifestations of the impersonal truth?