Dhamma Verses (Dhammapada, KN 2)

3: The Chapter about the Mind – 46
Understanding and wisdom overcome Māra
Five hundred monks were invited to stay in a forest for the
Rains Retreat, but the tree spirits were not happy, and drove
them away; the Buddha taught the monks the discourse about
loving-kindness, they returned, and the spirits served their
needs; the monks developed insight and the Buddha then gave
this teaching.
40. Kumbhūpamaṁ kāyam-imaṁ viditvā,
nagarūpamaṁ cittam-idaṁ ṭhapetvā,
yodhetha Māraṁ paññāvudhena,
jitañ-ca rakkhe, anivesano siyā.
Knowing this body is frail like a jar,
establishing the mind like a fortress,
fight Māra with the weapon of wisdom,
guard your success, and do not be attached.