Śrīmad-Bhāgavatam 4.1.62
వైతానికే కర్మణి యన్నామభిర్బ్రహ్మవాదిభి: ।
ఆగ్నేయ్య ఇష్టయో యజ్ఞే నిరూప్యన్తేఽగ్నయస్తు తే ॥ ౬౨ ॥
vaitānike karmaṇi yan-
[vaitaanike karmani yan-]
nāmabhir brahma-vādibhiḥ
[naamabhir brahma-vaadibhih]
āgneyya iṣṭayo yajṣe
[aagneyya ishtayo yajshe]
nirūpyante ’gnayas tu te
[niroopyante ’gnayas tu te]
Word-for-word
vaitānike
—
offering of oblations
karmaṇi
—
the activity
yat
—
of the fire-gods
nāmabhiḥ
—
by the names
brahma-vādibhiḥ
—
by impersonalist brāhmaṇas
āgneyyaḥ
—
for Agni
iṣṭayaḥ
—
sacrifices
yajṣe
—
in the sacrifice
nirūpyante
—
are the objective
agnayaḥ
—
the forty-nine fire-gods
tu
—
but
te
—
those.
Blended reading (Sanskrit + English inline)
vaitānike karmaṇi yan-
vaitānike
offering of oblations
karmaṇi
the activity
yat
of the fire-gods
nāmabhir brahma-vādibhiḥ
nāmabhiḥ
by the names
brahma-vādibhiḥ
by impersonalist brāhmaṇas
āgneyya iṣṭayo yajṣe
āgneyyaḥ
for Agni
iṣṭayaḥ
sacrifices
yajṣe
in the sacrifice
nirūpyante ’gnayas tu te
nirūpyante
are the objective
agnayaḥ
the forty-nine fire-gods
tu
but
te
those.
These forty-nine fire-gods are the beneficiaries of the oblations offered in the Vedic sacrificial fire by impersonalist brāhmaṇas.
Purport
Impersonalists who perform Vedic fruitive sacrifices are attracted to the various fire-gods and offer oblations in their name. The forty-nine fire-gods are described herewith.
— A.C. Bhaktivedanta Swami Prabhupāda
Gauḍīya Ācāryas
Viśvanātha Cakravartī Ṭhākura
Gauḍīya
Translation
These are the forty-nine persons with whose names the offerings related to Agni are performed by followers of the Vedas in Vedic rites of sacrifice.
By the names of these forty-nine devatās, offerings are performed (nirūpyante) in Vedic (vaitānike) actions of sacrifice. These are not the common fires, and thus there is no waste in having so many.
My note
Source: vedabase.io