Shankhayanagrihyasutra 2.13.5

2.13.5

: mekhalā ced asaṃdheyā bhavaty anyām kṛtvā anumantrayate /

'Thou who knowest the distinction of pure and impure, divine protectress Sarasvatî, O girdle, prolong my vow unimpaired, unbroken.
'Thou, Agni, art the pure bearer of vows. Agni, carry hither the gods to our sacrifice and our oblation.
'Bearing the vows, the infallible protector of vows, be our messenger, undecaying and mighty. Giving treasures, merciful, Agni, protect us, that we may live, Gâtavedas!