One verse

Srimad Bhagavatam 11.10.5

11.10.5

यमानभीक्ष्णं सेवेत नियमान् मत्पर: क्व‍‍चित् । मदभिज्ञं गुरुं शान्तमुपासीत मदात्मकम् ॥ ५ ॥

yamān abhīkṣṇaṁ seveta niyamān mat-paraḥ kvacit mad-abhijñaṁ guruṁ śāntam upāsīta mad-ātmakam

yamān
major regulative principles, such as not to kill
abhīkṣṇam
always
seveta
one should observe
niyamān
minor regulations, such as cleansing the body
mat-paraḥ
one who is devoted to Me
kvacit
as far as possible
mat-abhijñam
one who knows Me as I am in My personal form
gurum
the spiritual master
śāntam
peaceful
upāsīta
one should serve
mat-ātmakam
who is not different from Me

One who has accepted Me as the supreme goal of life should strictly observe the scriptural injunctions forbidding sinful activities and, as far as possible, should execute the injunctions prescribing minor regulative duties such as cleanliness. Ultimately, however, one should approach a bona fide spiritual master who is full in knowledge of Me as I am, who is peaceful, and who by spiritual elevation is not different from Me.