The woe that the people who give less and take more than they deserve is the same as that the deniers deserve.
يَوْمَئِذٍ (That day): The Day of Recompense.
لِّلْمُكَذِّبِينَ (The deniers): Denying means saying what contradicts the reality and turning the facts. It has stages, the highest and the most repulsive one is denying the faith summit which is “there is no God but Allah (swt)”. Denying the Last Day means denying one of the pillars of Iman (faith).