78:28

وَكَذَّبُوا بِآيَاتِنَا كِذَّابًا

Transliteration:

Wakaththaboo bi-ayatina kiththaban

Word by Word:

And they denied Our Signs (with) denial.

Translations:

having given the lie to Our messages one and all:

But they (impudently) treated Our Signs as false.

They called Our revelations false with strong denial.

And rejected Our messages, giving the lie (thereto).

And denied Our verses with [emphatic] denial.