(Then he went to his people, walking with pride), meaning: swaggering.

Muhammad said: His saying: (He walks with pride) is originally "yatamattatu" (stretching/walking with agitation); the "ta" was changed to a "ya", just as they say "yatazanna" (to suspect), while its origin is "yatazannanu". Tafsir of Surat al-Qiyamah from verse (34-40).