Bhagavad Gita, Chapter 10, Verse 38

Of punishers I am the sceptre; of those who seek to conquer, I am statesmanship; and also of things secret I am silence, and the knowledge of knowers am I.

Silence is named here as its own real form of strength, not simply the absence of speech.

Pairing punishment and silence with wisdom shows this glory reaching into discipline and restraint, not only into visibly impressive things. Real strength is shown taking quiet, unglamorous forms too.