"Cursed be the liars," meaning: cursed are those who deny the Resurrection, and that is from them a conjecture (takharrus).
﴿قتل﴾ أَي: لعن ﴿الخراصون﴾ الَّذين يكذبُون بِالْبَعْثِ وَذَلِكَ مِنْهُم تخرص