Dhammapada 3.6.40

3.6.40

‘‘Kumbhūpamaṃ kāyamiṃma viditvā, nagarūpamaṃ cittamidaṃ ṭhapetvā;
Yodhetha māraṃ paññāvudhena, jitañca rakkhe anivesano siyā’’ti.

40. Realizing that this body is fragile as a jar, establishing these thoughts as firm as a city,
One should attack Māra with the weapon of wisdom; one should stand guard over Māra when he is defeated; one should never rest.