One verse

Srimad Bhagavatam 4.8.44

4.8.44

प्राणायामेन त्रिवृता प्राणेन्द्रियमनोमलम् । शनैर्व्युदस्याभिध्यायेन्मनसा गुरुणा गुरुम् ॥ ४४ ॥

pranayamena tri-vrta pranendriya-mano-malam sanair vyudasyabhidhyayen manasa guruna gurum

pranayamena
by breathing exercises
tri-vrta
by the three recommended ways
prana-indriya
the life air and the senses
manah
mind
malam
impurity
sanaih
gradually
vyudasya
giving up
abhidhyayet
meditate upon
manasa
by the mind
guruna
undisturbed
gurum
the supreme spiritual master, Krsna.

After sitting on your seat, practice the three kinds of breathing exercises, and thus gradually control the life air, the mind and the senses. Completely free yourself from all material contamination, and with great patience begin to meditate on the Supreme Personality of Godhead.