Dhamma Verses (Dhammapada, KN 2)

3: The Chapter about the Mind – 41
The wise steady their minds
The Buddha’s attendant Meghiya left the Buddha alone
against his wishes, and went and meditated in a mango grove;
his mind was overcome with defilements and the Buddha
taught him with these verses at the conclusion of which he
attained stream-entry.
33. Phandanaṁ capalaṁ cittaṁ, dūrakkhaṁ dunnivārayaṁ,
ujuṁ karoti medhāvī, usukāro va tejanaṁ.
An agitated and unsteady mind,
difficult to guard, difficult to ward,
the sagacious one will make straight,
as a fletcher does his arrow.
34. Vārijo va thale khitto, oka-m-okata ubbhato,
pariphandatidaṁ cittaṁ, Māradheyyaṁ pahātave.
Like a fish thrown up on dry land,
pulled out from its watery home,
mind is agitated, one ought
to throw off the sway of Māra.