One verse

Bhagavad Gita 18.68

18.68

य इदं परमं गुह्यं मद्भक्तेष्वभिधास्यति | भक्तिं मयि परां कृत्वा मामेवैष्यत्यसंशयः ||१८-६८||

ya idaṃ paramaṃ guhyaṃ madbhakteṣvabhidhāsyati . bhaktiṃ mayi parāṃ kṛtvā māmevaiṣyatyasaṃśayaḥ ||18-68||

idam
this
paramam
most
guhyam
confidential secret
mat
of Mine
bhakteṣu
amongst devotees
abhidhāsyati
explains
bhaktim
devotional service
mayi
unto Me
parām
transcendental
kṛtvā
doing
mām
unto Me
eva
certainly
eṣyati
comes
asaṁśayaḥ
without doubt

For one who explains this supreme secret to the devotees, pure devotional service is guaranteed, and at the end he will come back to Me.