Origin of "Satyameva Jayate"

"Satyameva Jayate" (satyam-eva jayate सत्यमेव जयते) (Sanskrit: "Truth Alone Triumphs") is the national motto of India and is inscribed in Devanagari script at the base of the national emblem, which is an adaptation of the Lion Capital of Asoka at Sarnath, near Varanasi in the north Indian state of Uttar Pradesh.

The source of the motto is a well-known mantra 3.1.6 from the Mundaka Upanishad. Full mantra is as follows:

सत्यमेव जयते नानृतम् सत्येन पन्था विततो देवयानः ।
येनाक्रमत् मनुष्यो ह्यात्मकामो यत्र तत् सत्यस्य परं निधानं ॥

Meaning:

Truth alone triumphs; not falsehood. Through truth the divine path is spread out by which
the sages whose desires have been completely fulfilled, reach where that supreme treasure of Truth resides.