One verse

Srimad Bhagavatam 10.7.17

10.7.17

विप्रा मन्त्रविदो युक्तास्तैर्या: प्रोक्तास्तथाशिष: । ता निष्फला भविष्यन्ति न कदाचिदपि स्फुटम् ॥ १७ ॥

viprā mantra-vido yuktās tair yāḥ proktās tathāśiṣaḥ tā niṣphalā bhaviṣyanti na kadācid api sphuṭam

viprāḥ
the brāhmaṇas
mantra-vidaḥ
completely expert in chanting the Vedic hymns
yuktāḥ
perfect mystic yogīs
taiḥ
by them
yāḥ
whatsoever
proktāḥ
was spoken
tathā
becomes just so
āśiṣaḥ
all blessings
tāḥ
such words
niṣphalāḥ
useless, without fruit
bhaviṣyanti na
never will become
kadācit
at any time
api
indeed
sphuṭam
always factual, as it is

The brāhmaṇas, who were completely expert in chanting the Vedic hymns, were all yogīs fully equipped with mystic powers. Whatever blessings they spoke were certainly never fruitless.