One verse

Srimad Bhagavatam 4.23.11

4.23.11

तस्यानया भगवत: परिकर्मशुद्ध सत्त्वात्मनस्तदनुसंस्मरणानुपूर्त्या । ज्ञानं विरक्तिमदभून्निशितेन येन चिच्छेद संशयपदं निजजीवकोशम् ॥ ११ ॥

tasyanaya bhagavatah parikarma-suddha- sattvatmanas tad-anusamsmarananupurtya jnanam viraktimad abhun nisitena yena ciccheda samsaya-padam nija-jiva-kosam

tasya
his
anaya
by this
bhagavatah
of the Supreme Personality of Godhead
parikarma
activities in devotional service
suddha
pure, transcendental
sattva
existence
atmanah
of the mind
tat
of the Supreme Personality of Godhead
anusamsmarana
constantly remembering
anupurtya
being perfectly done
jnanam
knowledge
virakti
nonattachment
mat
possessing
abhut
became manifested
nisitena
by sharpened activities
yena
by which
ciccheda
become separated
samsaya-padam
position of doubtfulness
nija
own
jiva-kosam
encagement of the living entity

By regularly discharging devotional service, Prthu Maharaja became transcendental in mind and could therefore constantly think of the lotus feet of the Lord. Because of this, he became completely detached and attained perfect knowledge by which he could transcend all doubt. Thus he was freed from the clutches of false ego and the material conception of life.