One verse

Srimad Bhagavatam 11.27.10

11.27.10

पूर्वं स्‍नानं प्रकुर्वीत धौतदन्तोऽङ्गशुद्धये । उभयैरपि च स्‍नानं मन्त्रैर्मृद्ग्रहणादिना ॥ १० ॥

pūrvaṁ snānaṁ prakurvīta dhauta-danto ’ṅga-śuddhaye ubhayair api ca snānaṁ mantrair mṛd-grahaṇādinā

pūrvam
first
snānam
bath
prakurvīta
one should perform
dhauta
having cleaned
dantaḥ
his teeth
aṅga
of the body
śuddhaye
for purification
ubhayaiḥ
with both kinds
api ca
also
snānam
bathing
mantraiḥ
with mantras
mṛt-grahaṇa-ādinā
by smearing with earth and so on

One should first purify his body by cleansing his teeth and bathing. Then one should perform a second cleansing by smearing the body with earth and chanting both Vedic and tantric mantras.