SB 1.7.20
athopasprsya salilam
sandadhe tat samahitah
ajanann api samharam
prana-krcchra upasthite
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Since his life was in danger, he touched water in sanctity and concentrated upon the chanting of the hymns for throwing nuclear weapons, although he did not know how to withdraw such weapons.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The subtle forms of material activities are finer than grosser methods of material manipulation. Such subtle forms of material activities are effected through purification of sound. The same method is adopted here by chanting hymns to act as nuclear weapons.