The performer of the ritual such as Shanti, at the beginning briefly mentions the task that is ahead to the Brahmins in the assembly and requests for their blessings for eligibility of the ritual. This is called Anujna.
..............कर्तुं योग्यता सिद्धिं अनुगृहाण this is the request.
Brahmins say योग्यता सिद्धिरस्तु - may you be eligible.
Dharma shastra says :
ब्राह्मणानां विना वाक्यैः क्रियाः स्युर्निर्निष्फलाः स्मृताः
कर्तव्या ब्राह्मणानुज्ञा कर्मणां परिपूर्तये
Any task performed without obtaining the permission of the brahmins will be fruitless. The act of anujna should be performed for successful completion of the task,
How these blessings should be obtained ?
महादनुग्रहश्च द्रव्यदानेन कारयितव्यः
The blessings should be obtained by offering danam.
दाने सर्वं प्रतिष्ठितम् ( तैत्तिरीय आरण्यकम् )