One verse

Srimad Bhagavatam 6.15.27

6.15.27

श्रीनारद उवाच एतां मन्त्रोपनिषदं प्रतीच्छ प्रयतो मम । यां धारयन् सप्तरात्राद् द्रष्टा सङ्कर्षणं विभुम् ॥ २७ ॥

sri-narada uvaca etam mantropanisadam praticcha prayato mama yam dharayan sapta-ratrad drasta sankarsanam vibhum

sri-naradah uvaca
Sri Narada Muni said
etam
this
mantra-upanisadam
Upanisad in the form of a mantra by which one can achieve the highest goal of life
praticcha
accept
prayatah
with great attention (after finishing the funeral ceremony of your dead son)
mama
from me
yam
which
dharayan
accepting
sapta-ratrat
after seven nights
drasta
you will see
sankarsanam
the Supreme Personality of Godhead, Sankarsana
vibhum
the Lord

The great sage Narada continued: My dear King, attentively receive from me a mantra, which is most auspicious. After accepting it from me, in seven nights you will be able to see the Lord face to face.